fix: code block filename regexp group names missed

[JounQin]

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Description of changes

Introduced by #550, it should be related to auto fixing

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• test/snapshots/fixtures.test.ts.snap: Language not supported
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Comments suppressed due to low confidence (1)

packages/eslint-plugin-mdx/src/processors/markdown.ts:253

• The updated regex now includes named capture groups, but fileNameFromMeta still returns the full match result. Consider extracting and returning the value of the 'filename' group (e.g., using match?.groups?.filename) to make the code clearer and more robust.

function fileNameFromMeta(block: CodeBlock) {

[github-actions]

📊 Package size report   No changes

File	Before	After
Total (Includes all files)	4.1 MB	4.1 MB
Tarball size	1.1 MB	1.1 MB

Unchanged files

File	Size
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.changeset/config.json	372 B
.changeset/eleven-cobras-care.md	139 B
.changeset/great-snakes-nail.md	107 B
.changeset/nasty-bananas-sleep.md	84 B
.changeset/README.md	510 B
.codesandbox/ci.json	76 B
.editorconfig	145 B
.env.yarn	44 B
.gitattributes	35 B
.github/FUNDING.yml	204 B
.github/workflows/ci.yml	1.5 kB
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CHANGELOG.md	283 B
CONTRIBUTING.md	931 B
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LICENSE	1.1 kB
package.json	3.4 kB
packages/eslint-mdx/CHANGELOG.md	26.5 kB
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packages/eslint-mdx/package.json	1.7 kB
packages/eslint-mdx/README.md	12.2 kB
packages/eslint-mdx/shim.d.ts	1.3 kB
packages/eslint-mdx/src/helpers.ts	3.4 kB
packages/eslint-mdx/src/index.ts	141 B
packages/eslint-mdx/src/meta.ts	206 B
packages/eslint-mdx/src/parser.ts	2.5 kB
packages/eslint-mdx/src/sync.ts	404 B
packages/eslint-mdx/src/tokens.ts	6.8 kB
packages/eslint-mdx/src/types.ts	1.6 kB
packages/eslint-mdx/src/worker.ts	22.1 kB
packages/eslint-mdx/tsconfig.json	166 B
packages/eslint-plugin-mdx/CHANGELOG.md	29.9 kB
packages/eslint-plugin-mdx/index.d.cts	52 B
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packages/eslint-plugin-mdx/README.md	12.2 kB
packages/eslint-plugin-mdx/src/configs/base.ts	311 B
packages/eslint-plugin-mdx/src/configs/code-blocks.ts	1.1 kB
packages/eslint-plugin-mdx/src/configs/flat.ts	818 B
packages/eslint-plugin-mdx/src/configs/index.ts	454 B
packages/eslint-plugin-mdx/src/configs/overrides.ts	781 B
packages/eslint-plugin-mdx/src/configs/recommended.ts	1.5 kB
packages/eslint-plugin-mdx/src/from-markdown.ts	291 B
packages/eslint-plugin-mdx/src/helpers.ts	773 B
packages/eslint-plugin-mdx/src/index.ts	161 B
packages/eslint-plugin-mdx/src/meta.ts	207 B
packages/eslint-plugin-mdx/src/processors/helpers.ts	665 B
packages/eslint-plugin-mdx/src/processors/index.ts	218 B
packages/eslint-plugin-mdx/src/processors/markdown.ts	14.7 kB
packages/eslint-plugin-mdx/src/processors/options.ts	1.6 kB
packages/eslint-plugin-mdx/src/processors/remark.ts	1.9 kB
packages/eslint-plugin-mdx/src/processors/types.ts	502 B
packages/eslint-plugin-mdx/src/rules/index.ts	149 B
packages/eslint-plugin-mdx/src/rules/remark.ts	3.6 kB
packages/eslint-plugin-mdx/src/rules/types.ts	430 B
packages/eslint-plugin-mdx/src/worker.ts	403 B
packages/eslint-plugin-mdx/tsconfig.json	153 B
patches/@1stg+eslint-config+8.3.2.patch	510 B
README.md	12.2 kB
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test/__snapshots__/parser.test.ts.snap	1.1 MB
test/fixtures.test.ts	3.2 kB
test/fixtures/287.mdx	204 B
test/fixtures/292.mdx	191 B
test/fixtures/334.mdx	70 B
test/fixtures/336.mdx	178 B
test/fixtures/367.mdx	87 B
test/fixtures/371.mdx	75 B
test/fixtures/380.mdx	11.0 kB
test/fixtures/391.mdx	62 B
test/fixtures/429.mdx	52 B
test/fixtures/435.mdx	134 B
test/fixtures/437.mdx	32 B
test/fixtures/445.mdx	188 B
test/fixtures/450.mdx	417 B
test/fixtures/488.mdx	78 B
test/fixtures/acorn.mdx	860 B
test/fixtures/adjacent.mdx	50 B
test/fixtures/async/.remarkrc	67 B
test/fixtures/async/test.md	15 B
test/fixtures/basic.mdx	405 B
test/fixtures/basic.tsx	77 B
test/fixtures/blank-lines.mdx	768 B
test/fixtures/code-blocks/278.md	511 B
test/fixtures/code-blocks/455.mdx	76 B
test/fixtures/code-blocks/470.mdx	88 B
test/fixtures/code-blocks/534.mdx	735 B
test/fixtures/comments.mdx	162 B
test/fixtures/details.mdx	881 B
test/fixtures/dir.mdx/.gitkeep	0 B
test/fixtures/esm/.remarkrc.mjs	103 B
test/fixtures/esm/test.md	15 B
test/fixtures/jsx-in-list.mdx	810 B
test/fixtures/leading-spaces.mdx	42 B
test/fixtures/markdown.md	5 B
test/fixtures/no-unescaped-entities.mdx	99 B
test/fixtures/no-unused-expressions.mdx	90 B
test/fixtures/processor.mdx	13 B
test/fixtures/remark.md	171 B
test/fixtures/remark.mdx	169 B
test/fixtures/style/.remarkrc	228 B
test/fixtures/style/nested.md	10 B
test/fixtures/style/plugin1.cjs	26 B
test/fixtures/style/plugin2.mjs	24 B
test/fixtures/unicorn.jsx	119 B
test/fixtures/unicorn.mdx	118 B
test/helpers.test.ts	874 B
test/helpers.ts	954 B
test/jest.serializer.cjs	347 B
test/jest.serializer.d.cts	143 B
test/jest.serializer.test.ts	527 B
test/parser.test.ts	4.7 kB
test/remark.test.ts	2.9 kB
tsconfig.base.json	253 B
tsconfig.json	213 B
tsconfig.lib.json	182 B

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