CI: Update image build workflow

.github/workflows/buildimage.yml

@@ -7,23 +7,23 @@ on:
 
 jobs:
   build-image:
-    runs-on: ubuntu-20.04 # change to -latest when possible
+    runs-on: ubuntu-22.04 # change to -latest when possible
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
 
       - name: Login to the GitHub Container Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GHCR_TOKEN }}
 
       - name: Push to Docker Hub
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v5
         with:
           context: .github/workflows
           tags: ghcr.io/tecosaur/emacs-config:latest