chore(deps): bump the npm-dependencies group across 1 directory with 3 updates

Bumps the npm-dependencies group with 3 updates in the /actions/helm/generate-docs directory: [@textlint/textlint-plugin-markdown](https://github.com/textlint/textlint), [prettier](https://github.com/prettier/prettier) and [textlint](https://github.com/textlint/textlint).


Updates `@textlint/textlint-plugin-markdown` from 15.5.0 to 15.5.1
- [Release notes](https://github.com/textlint/textlint/releases)
- [Commits](textlint/textlint@v15.5.0...v15.5.1)

Updates `prettier` from 3.8.0 to 3.8.1
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.8.0...3.8.1)

Updates `textlint` from 15.5.0 to 15.5.1
- [Release notes](https://github.com/textlint/textlint/releases)
- [Commits](textlint/textlint@v15.5.0...v15.5.1)

---
updated-dependencies:
- dependency-name: "@textlint/textlint-plugin-markdown"
  dependency-version: 15.5.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
- dependency-name: prettier
  dependency-version: 3.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
- dependency-name: textlint
  dependency-version: 15.5.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

actions/helm/generate-docs/package-lock.json

@@ -1,10 +1,10 @@
 {
   "name": "generate-docs",
   "dependencies": {
-    "@textlint/textlint-plugin-markdown": "^15.5.0",
+    "@textlint/textlint-plugin-markdown": "^15.5.1",
     "markdownlint-cli2": "^0.20.0",
-    "prettier": "^3.8.0",
-    "textlint": "^15.5.0",
+    "prettier": "^3.8.1",
+    "textlint": "^15.5.1",
     "textlint-filter-rule-comments": "^1.3.0",
     "textlint-rule-terminology": "^5.2.16"
   }