fix: correct blockESLintPlugin peerDependencies and config file name

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🐛 Bug: blockESLintPlugin shouldn't add peerDependencies #2134, 🐛 Bug: .eslint-doc-generatorrc.js should be .mjs in CJS packages #2137
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

🎁

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.81%. Comparing base (4cea9fc) to head (c3c121d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2138      +/-   ##
==========================================
- Coverage   99.81%   99.81%   -0.01%     
==========================================
  Files         129      129              
  Lines        5448     5444       -4     
  Branches      391      392       +1     
==========================================
- Hits         5438     5434       -4     
  Misses         10       10              

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[github-actions]

🎉 This is included in version v2.26.3 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀