chore(deps): update dependency eslint to v9.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint (source)	9.20.0 -> 9.21.0

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Release Notes

eslint/eslint (eslint)

v9.21.0

Compare Source

Features

• 418717f feat: introduce new deprecated types for rules (#​19238) (fnx)
• 5c5b802 feat: Add --ext CLI option (#​19405) (Milos Djermanovic)

Bug Fixes

• db5340d fix: update missing plugin message template (#​19445) (Milos Djermanovic)
• d8ffdd4 fix: do not exit process on rule crash (#​19436) (Francesco Trotta)

Documentation

• c5561ea docs: Update README (GitHub Actions Bot)
• 80b0485 docs: replace var with let and const in rule example (#​19434) (Tanuj Kanti)
• f67d5e8 docs: Update README (GitHub Actions Bot)
• 75afc61 docs: Update README (GitHub Actions Bot)
• 0636cab docs: Update Eleventy from v2 to v3 (#​19415) (Amaresh S M)
• dd7d930 docs: Update README (GitHub Actions Bot)

Chores

• a8c9a9f chore: update @eslint/eslintrc and @eslint/js (#​19453) (Francesco Trotta)
• 265e0cf chore: package.json update for @​eslint/js release (Jenkins)
• 3401b85 test: add test for Rule.ReportDescriptor type (#​19449) (Francesco Trotta)
• e497aa7 chore: update rewrite dependencies (#​19448) (Francesco Trotta)
• dab5478 chore: better error message for missing plugin in config (#​19402) (Tanuj Kanti)
• ebfe2eb chore: set js language for bug report issue config block (#​19439) (Josh Goldberg ✨)
• 5fd211d test: processors can return subpaths (#​19425) (Milos Djermanovic)

v9.20.1

Compare Source

Bug Fixes

• 274f054 fix: fix RuleContext type (#​19417) (Francesco Trotta)

Documentation

• fe3ccb2 docs: allow typing in search box while dropdown is open (#​19424) (Amaresh S M)
• 93c78a5 docs: Add instructions for pnpm compat (#​19422) (Nicholas C. Zakas)
• b476a93 docs: Fix Keyboard Navigation for Search Results (#​19416) (Amaresh S M)
• ccb60c0 docs: Update README (GitHub Actions Bot)

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