chore(deps): bump actions/cache from 5 to 6

Bumps [actions/cache](https://github.com/actions/cache) from 5 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v5...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>

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
         run: echo "path=$(pnpm store path --silent)" >> $GITHUB_OUTPUT
 
       - name: Cache pnpm store
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ steps.pnpm-store.outputs.path }}
           key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
@@ -77,7 +77,7 @@ jobs:
             || sudo apt-get install -y --no-install-recommends libsoup2.4-dev
 
       - name: Cache Cargo registry and build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry

.github/workflows/release.yml

@@ -106,7 +106,7 @@ jobs:
 
       - name: Setup pnpm cache
         if: runner.os != 'Windows' || matrix.arch != 'arm64'
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ steps.pnpm-store.outputs.path }}
           key: ${{ runner.os }}-${{ runner.arch }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}