add dependabot and update actions deps

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/docker-build-push-dockerhub.yml

@@ -34,14 +34,14 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Git submodule update
         run: |
           git submodule update --init
 
       - name: Log in to the Docker Hub registry
-        uses: docker/login-action@v1.10.0
+        uses: docker/login-action@v2
         with:
           # Username used to log against the Docker registry
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
@@ -51,7 +51,7 @@ jobs:
           logout: true # optional, default is true
 
       - name: Log in to the Github Container registry
-        uses: docker/login-action@v1.10.0
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.actor }}