Bump the actions group in /.github/workflows with 2 updates

Bumps the actions group in /.github/workflows with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [actions/cache](https://github.com/actions/cache).


Updates `actions/checkout` from 5.0.0 to 6.0.2
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...de0fac2)

Updates `actions/cache` from 5.0.3 to 5.0.4
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@cdf6c1f...6682284)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/cache
  dependency-version: 5.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/tox.yml

@@ -159,7 +159,7 @@ jobs:
           enable-cache: false
           ignore-empty-workdir: "true"
       - if: inputs.fill
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ inputs.checkout_ref }}
           persist-credentials: false
@@ -222,7 +222,7 @@ jobs:
 
       - name: Cache ${{ matrix.cache_key }}
         if: ${{ matrix.cache-path != '' && matrix.cache-key != '' }}
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
         with:
           path: ${{ matrix.cache-path }}
           key: ${{ matrix.cache-key }}