fix(deps): update dependency astring to ^1.8.5 for gatsby-plugin-mdx (#38150)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/gatsby-plugin-mdx/package.json

@@ -30,7 +30,7 @@
     "@mdx-js/mdx": "^2.3.0",
     "acorn": "^8.8.2",
     "acorn-jsx": "^5.3.2",
-    "astring": "^1.8.4",
+    "astring": "^1.8.5",
     "deepmerge": "^4.3.1",
     "estree-util-build-jsx": "^2.2.2",
     "fs-extra": "^11.1.1",

yarn.lock

@@ -6048,10 +6048,10 @@ astral-regex@^2.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
-astring@^1.8.0, astring@^1.8.4:
-  version "1.8.4"
-  resolved "https://registry.yarnpkg.com/astring/-/astring-1.8.4.tgz#6d4c5d8de7be2ead9e4a3cc0e2efb8d759378904"
-  integrity sha512-97a+l2LBU3Op3bBQEff79i/E4jMD2ZLFD8rHx9B6mXyB2uQwhJQYfiDqUwtfjF4QA1F2qs//N6Cw8LetMbQjcw==
+astring@^1.8.0, astring@^1.8.5:
+  version "1.8.6"
+  resolved "https://registry.yarnpkg.com/astring/-/astring-1.8.6.tgz#2c9c157cf1739d67561c56ba896e6948f6b93731"
+  integrity sha512-ISvCdHdlTDlH5IpxQJIex7BWBywFWgjJSVdwst+/iQCoEYnyOaQ95+X1JGshuBjGp6nxKUy1jMgE3zPqN7fQdg==
 
 [email protected]:
   version "1.2.3"