build(deps): bump actions/cache in /.github/actions/docker-build (#260)

Bumps [actions/cache](https://github.com/actions/cache) from 4.3.0 to 5.0.1.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@0057852...9255dc7)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 5.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/actions/docker-build/action.yml

@@ -27,7 +27,7 @@ runs:
     - name: Configure cache
       shell: bash
       run: echo "DOCKER_BUILDKIT_CACHE=${{ runner.temp }}/.buildx-cache" >> $GITHUB_ENV
-    - uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830
+    - uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb
       with:
         path: ${{ env.DOCKER_BUILDKIT_CACHE }}
         key: ${{ runner.os }}-buildx-linkerd-extension-init-${{ inputs.tag }}