add pull request trigger as well

Author: finger563

.github/workflows/static_analysis.yml

@@ -1,6 +1,9 @@
 name: Static analysis
 
 on: 
+  pull_request:
+    branches:
+      - "*"
   # 'pull_request_target' allows this Action to also run on forked repositories
   # The output will be shown in PR comments (unless the 'force_console_print' flag is used)
   pull_request_target: