Fix determining BeeGFS version

If multiple tags pointed to the same commit, the version may not be set correctly.
Always use the tag pushed to GitHub as the version to avoid issues.

.github/workflows/build-publish.yaml

@@ -3,16 +3,15 @@ name: "Build and Publish"
 on:
   workflow_dispatch:
   push:
+    # The ${{ github.ref_name }} is used as the BeeGFS version so this workflow should only be
+    # triggered by pushing tags that match the BeeGFS semantic versioning scheme.
     tags:
       - "[0-9].[0-9].[0-9]"
-  pull_request:
-    branches:
-      - "main"
 
 env:
   REGISTRY: ghcr.io
   NAMESPACE: thinkparq
-  DOCKER_BUILDX_BUILD_PLATFORMS: "linux/amd64,linux/arm64"  
+  DOCKER_BUILDX_BUILD_PLATFORMS: "linux/amd64,linux/arm64"
 
 jobs:
   publish-images:
@@ -29,13 +28,13 @@ jobs:
       packages: write
       contents: read
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-tags: true
           fetch-depth: 0
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3    
+        uses: docker/setup-buildx-action@v3
 
       - name: Log in to the GitHub Container Registry
         uses: docker/#-action@v3
@@ -47,13 +46,7 @@ jobs:
       - name: Install Cosign
         uses: sigstore/cosign-installer@v3.1.1
         with:
-          cosign-release: "v2.1.1"          
-
-      - name: Determine what version of BeeGFS to build images for based on the last tag
-        id: determine_beegfs_version
-        run: |
-          last_version=$(git describe --tags --abbrev=0)
-          echo "LAST_VERSION=$last_version" >> $GITHUB_OUTPUT
+          cosign-release: "v2.1.1"
 
       - name: Determine metadata for BeeGFS image
         id: meta
@@ -83,7 +76,7 @@ jobs:
           # Reference: https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images
           outputs: type=image,name=target,annotation-index.org.opencontainers.image.description=Container images for the BeeGFS server services allowing fully containerized BeeGFS deployments
           build-args: |
-            BEEGFS_VERSION=${{ steps.determine_beegfs_version.outputs.LAST_VERSION }}
+            BEEGFS_VERSION=${{ github.ref_name }}
           target: ${{ matrix.image_name }}
 
       # Adapted from: