Bump actions/cache from 3 to 4 (#331)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - name: Retrieve cache
         id: cache-key
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: packer-builder-arm
           key: key-${{ github.sha }}-1
@@ -48,7 +48,7 @@ jobs:
 
       - name: Cache binary
         if: steps.cache-key.outputs.cache-hit != 'true'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: packer-builder-arm
           key: key-${{ github.sha }}-1
@@ -98,7 +98,7 @@ jobs:
           packer-version: 1.10.0
 
       - name: Retrieve cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: packer-builder-arm
           key: key-${{ github.sha }}-1
@@ -124,7 +124,7 @@ jobs:
       - uses: actions/[email protected]
 
       - name: Cache Vagrant boxes
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.vagrant.d/boxes
           key: ${{ runner.os }}-vagrant-${{ hashFiles('Vagrantfile') }}
@@ -153,7 +153,7 @@ jobs:
           "
 
       - name: Retrieve cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: packer-builder-arm
           key: key-${{ github.sha }}-1