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](https://github.com/actions/cache/compare/v3...v4)

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

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

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/go-build
@@ -67,7 +67,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/go-build
@@ -138,7 +138,7 @@ jobs:
         with:
           go-version-file: go.mod
       - name: Cache Go modules
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/go-build
@@ -153,7 +153,7 @@ jobs:
         run: date +%s > ~/.cache/go-build/trim.txt
         continue-on-error: true
       - name: Cache Nomad and CNI binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ${{ github.workspace }}/nomad

.github/workflows/docker-image.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/go-build