Merge pull request #2325 from UKGovernmentBEIS/dependabot/github_acti…

…ons/actions/cache-4

Bump actions/cache from 3 to 4

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Create coverage directory
         run: mkdir -p ./coverage
       - id: cache-docker
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/docker-save
           key: docker-save-${{ hashFiles('Dockerfile', 'Gemfile.lock', 'yarn.lock') }}