ci: bump the actions-deps group across 1 directory with 2 updates

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


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

Updates `actions/cache` from 4 to 5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions-deps
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions-deps
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -20,13 +20,13 @@ jobs:
       matrix:
         test_env: [django, functional, api]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Cache Docker layers
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/.buildx-cache
           # using `-v3` in key to clear old cache due to errors
@@ -117,7 +117,7 @@ jobs:
       matrix:
         tox_env: [docs, precommit, mypy, lint]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - uses: actions/setup-python@v6

.github/workflows/publish.yml

@@ -16,14 +16,14 @@ jobs:
   publish:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: true
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Cache Docker layers
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/.buildx-cache
           # using `v2` in key to clear old cache due to errors