build(deps): bump actions/cache

Bumps the github-actions group with 1 update in the / directory: [actions/cache](https://github.com/actions/cache).


Updates `actions/cache` from 5.0.5 to 6.0.0
- [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/27d5ce7f107fe9357f9df03efb73ab90386fccae...2c8a9bd7457de244a408f35966fab2fb45fda9c8)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

.github/workflows/bazel.yml

diff --git a/.github/workflows/bazel.yml b/.github/workflows/bazel.yml
index fe26dca..842dde3 100644
--- a/.github/workflows/bazel.yml
+++ b/.github/workflows/bazel.yml
@@ -26,7 +26,7 @@
       - name: Download dependencies
         run: python3 utils/git-sync-deps
       - name: Mount Bazel cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0
         with:
           path: ~/.bazel/cache
           # Force a new cache version by updating the number in 'generationN'
@@ -50,7 +50,7 @@
       - name: Download dependencies
         run: python3 utils/git-sync-deps
       - name: Mount Bazel cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0
         with:
           path: ~/.bazel/cache
           key: bazel-cache-${{ runner.os }}