fix: trigger on current default branch (master)

Author: dnitsch

.github/workflows/release.yml

@@ -7,11 +7,11 @@ on:
       - completed
     branches: 
       - master
-      - main
+
 jobs:
   set-version:
     runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.head_branch == 'main' }}
+    if: ${{ github.event.workflow_run.head_branch == 'master' }}
     container:
       image: mcr.microsoft.com/dotnet/sdk:6.0 
     outputs: