Bump eslint from 9.20.1 to 9.21.0 in /web/textviewer (#1372)

Bumps [eslint](https://github.com/eslint/eslint) from 9.20.1 to 9.21.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v9.20.1...v9.21.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

web/textviewer/package-lock.json

@@ -19,7 +19,7 @@
     "@typescript-eslint/eslint-plugin": "^8.24.1",
     "@typescript-eslint/parser": "^8.24.1",
     "copy-webpack-plugin": "^12.0.2",
-    "eslint": "^9.20.1",
+    "eslint": "^9.21.0",
     "@stylistic/eslint-plugin": "3.1.0",
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-n": "^16.6.2",