fix(release): lowercase image name for Docker tag compatibility

Author: ChipWolf

.github/workflows/release.yml

@@ -41,11 +41,18 @@ jobs:
       contents: read
       packages: write
     outputs:
-      image: ${{ steps.image.outputs.image }}
+      image: ${{ steps.image.outputs.name }}
       digest: ${{ steps.build.outputs.digest }}
     steps:
       - uses: actions/checkout@v4
 
+      - name: Lowercase image name
+        id: image
+        run: |
+          echo "name=${IMAGE_NAME,,}" >> "$GITHUB_OUTPUT"
+        env:
+          IMAGE_NAME: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}
+
       - name: Log in to GHCR
         uses: docker/login-action@v3
         with:
@@ -60,13 +67,8 @@ jobs:
           context: .
           push: true
           tags: |
-            ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}:latest
-            ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}:${{ needs.release-please.outputs.tag_name }}
-
-      - name: Output image
-        id: image
-        run: |
-          echo "image=${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}" >> "$GITHUB_OUTPUT"
+            ${{ steps.image.outputs.name }}:latest
+            ${{ steps.image.outputs.name }}:${{ needs.release-please.outputs.tag_name }}
 
   container-provenance:
     needs: [release-please, build]