build(deps): bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/containers.yml

@@ -127,7 +127,7 @@ jobs:
           echo "major-minor-branch-upstream=docker.io/${NSU}/${REPOSITORY}:${MAJOR_MINOR_BRANCH}" >> $GITHUB_OUTPUT
       - name: Set up cache
         id: cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         env:
           cache-name: dev-generic
         with:
@@ -278,7 +278,7 @@ jobs:
           echo "${delimiter}" >> $GITHUB_OUTPUT
       - name: Set up dev-generic cache
         id: dev-generic-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         env:
           cache-name: dev-generic
         with:
@@ -337,7 +337,7 @@ jobs:
           repository: ${{ env.zmk-repository }}
           ref: ${{ env.zmk-ref }}
       - name: Cache Zephyr modules
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         env:
           cache-name: zephyr-modules
         with: