chore(deps-dev): bump @typescript-eslint/eslint-plugin

Bumps the typescript-eslint group with 1 update: [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin).


Updates `@typescript-eslint/eslint-plugin` from 8.20.0 to 8.21.0
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.21.0/packages/eslint-plugin)

---
updated-dependencies:
- dependency-name: "@typescript-eslint/eslint-plugin"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: typescript-eslint
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -99,7 +99,7 @@
     "@types/rsvp": "^4.0.9",
     "@types/showdown": "^2.0.2",
     "@types/three": "^0.172.0",
-    "@typescript-eslint/eslint-plugin": "^8.20.0",
+    "@typescript-eslint/eslint-plugin": "^8.21.0",
     "@typescript-eslint/parser": "^8.20.0",
     "@uiw/codemirror-theme-github": "^4.23.6",
     "@vercel/edge": "^1.1.3",