Bump actions/cache from 5 to 6 (#1098)

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](actions/cache@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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     - uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node-version }}
-    - uses: actions/cache@v5
+    - uses: actions/cache@v6
       with:
         path: ~/.pnpm-store
         key: pnpm-store+${{matrix.platform}}+${{matrix.node-version}}+${{ hashFiles('**/pnpm-lock.yaml') }}
@@ -47,7 +47,7 @@ jobs:
     - uses: actions/setup-node@v6
       with:
         node-version: ^24.0.0
-    - uses: actions/cache@v5
+    - uses: actions/cache@v6
       with:
         path: ~/.pnpm-store
         key: pnpm-store+ubuntu-latest+^24.0.0+${{ hashFiles('**/pnpm-lock.yaml') }}