Update ghcr.yml

Author: xe1os

.github/workflows/ghcr.yml

@@ -3,7 +3,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - '**'
+      - master
 jobs:
   push:
     name: Create build and push to GHCR
@@ -50,3 +50,4 @@ jobs:
           push: true
           tags: |
             ghcr.io/${{ steps.string.outputs.lowercase }}/g5api:latest,ghcr.io/${{ steps.string.outputs.lowercase }}/g5api:${{ steps.getversion.outputs.version }}
+