build(deps): bump actions/cache from 4.2.0 to 4.2.1

Bumps [actions/cache](https://github.com/actions/cache) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@1bd1e32...0c907a7)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/bench.yml

@@ -90,7 +90,7 @@ jobs:
           bazel build -c opt --sandbox_writable_path=/home/bench/.cache/sccache quiche:quic_server quiche:quic_client
 
       - name: Download cached main-branch results
-        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        uses: actions/cache/restore@0c907a75c2c80ebcb7f088228285e798b750cf8f # v4.2.1
         with:
           path: |
             target/criterion
@@ -357,7 +357,7 @@ jobs:
 
       - name: Cache main-branch results
         if: ${{ github.ref == 'refs/heads/main' }}
-        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        uses: actions/cache/save@0c907a75c2c80ebcb7f088228285e798b750cf8f # v4.2.1
         with:
           path: |
             target/criterion

.github/workflows/qns.yml

@@ -198,7 +198,7 @@ jobs:
           pattern: '*results'
           path: results
 
-      - uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+      - uses: actions/cache/restore@0c907a75c2c80ebcb7f088228285e798b750cf8f # v4.2.1
         with:
           path: results-main
           key: qns-${{ github.sha }}
@@ -314,7 +314,7 @@ jobs:
           echo "${{ github.sha }}" > results-main/baseline-sha.txt
 
       - if: ${{ github.ref == 'refs/heads/main' }}
-        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        uses: actions/cache/save@0c907a75c2c80ebcb7f088228285e798b750cf8f # v4.2.1
         with:
           path: results-main
           key: qns-${{ github.sha }}