reverted github user

Author: joshika39

.github/workflows/build-and-push-ghcr.yml

@@ -32,7 +32,7 @@ jobs:
 
       - name: Log in to GitHub Container Registry (GHCR)
         if: github.actor != 'dependabot[bot]'
-        run: echo "${{ secrets.GHCR_PAT }}" | docker login ghcr.io -u ${{ secrets.GITHUB_USER }} --password-stdin
+        run: echo "${{ secrets.GHCR_PAT }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
       - name: Log in to Docker Hub
         if: github.actor != 'dependabot[bot]'