Update action.yml with default values for registry-username and registry-token

Author: jaydrogers

action.yml

@@ -6,12 +6,10 @@ inputs:
     required: true
   registry-username:
     description: 'Enter the username to authenticate with your registry.'
-    default: "${{ github.actor }}"
-    required: true
+    default: ''
   registry-token:
     description: 'Enter the token or password to authenticate with your registry. (an access token is highly recommended)'
-    default: "${{ secrets.GITHUB_TOKEN }}"
-    required: true
+    default: ''
   registry:
     description: 'Comma-separated list of container registries to authenticate with (e.g., "docker.io,ghcr.io").'
     default: 'docker.io' # Default to Docker Hub if not specified
@@ -48,8 +46,8 @@ runs:
         if: contains(inputs.registry, 'ghcr.io')
         uses: docker/login-action@v3
         with:
-          username: ${{ inputs.registry-username }}
-          password: ${{ inputs.registry-token }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
           registry: ghcr.io
 
       - name: Set up QEMU