chore(deps): bump actions/cache from 4 to 6

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/pull-request.yml

@@ -61,7 +61,7 @@ jobs:
         run: |
           echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v6
         with:
           # 缓存路径
           path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
@@ -97,7 +97,7 @@ jobs:
         run: |
           echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v6
         with:
           # 缓存路径
           path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
@@ -130,7 +130,7 @@ jobs:
         run: |
           echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v6
         with:
           # 缓存路径
           path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}