Update publish-to-maven.yml (#300)

Author: xinlili-statsig

.github/workflows/publish-to-maven.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.head_branch == 'main'  
+    if: github.event_name == 'workflow_dispatch' || (github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.head_branch == 'main')  
     timeout-minutes: 15
 
     steps: