Update PSDB.yml - removing trigger for synchronize events

very minor change , merging directly to reduce PSDB load

.github/workflows/PSDB.yml

@@ -5,7 +5,7 @@ name: ROCm CI PSDB
 on:
   pull_request:
     branches: [amd-staging]
-    types: [opened, synchronize, reopened, edited]
+    types: [opened, reopened, edited]
   workflow_dispatch:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel, below is a single job called invoke jenkins jobs