Update GitHub Actions to use GITHUB_TOKEN

Author: KatieHarris2397

.github/workflows/deploy.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
-          password: ${{ secrets.GHCR_TOKEN }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata for Docker
         id: meta