modifies workflow for lowercase

Author: DSUmjham

.github/workflows/publish.yml

@@ -33,6 +33,6 @@ jobs:
           push: true
           platforms: linux/amd64,linux/arm64
           tags: |
-            ghcr.io/${{ github.repository_owner }}/patch-hunter:latest
-            ghcr.io/${{ github.repository_owner }}/patch-hunter:${{ github.ref_name }}
+            ghcr.io/${{ github.repository_owner,, }}/patch-hunter:latest
+            ghcr.io/${{ github.repository_owner,, }}/patch-hunter:${{ github.ref_name }}