Go back to version numbers for GH Actions (#75)

Way easier for dependency updates / understanding. I don't think the security risk is high enough.

Author: SeanKilleen

.github/workflows/docker-publish.yml

@@ -45,13 +45,13 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@b467d6aa7afffae6d3d466d2a74bd266618f87d6
+        uses: docker/setup-buildx-action@v3.9.0
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@3b8fed7e4b60203b2aa0ecc6c6d6d91d12c06760
+        uses: docker/login-action@v3.3.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -61,15 +61,15 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@70b2cdc6480c1a8b86edf1777157f8f437de2166
+        uses: docker/metadata-action@v5.6.1
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85
+        uses: docker/build-push-action@v6.13.0
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}