Bump actions/cache from v2.1.4 to v2.1.5

Bumps [actions/cache](https://github.com/actions/cache) from v2.1.4 to v2.1.5.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.4...1a9e213)

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

.github/workflows/docker-manual.yml

@@ -31,7 +31,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Cache Docker layers
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}

.github/workflows/docker.yml

@@ -53,7 +53,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Cache Docker layers
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.event.client_payload.sha }}

.github/workflows/package-audit.yml

@@ -53,7 +53,7 @@ jobs:
           registry-url: https://npm.pkg.github.com
 
       - name: Cache node modules
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         env:
           cache-name: cache-node-modules
         with: