CI: add push-to-main trigger for js-lint, python-lint, and ash-security-scan workflows

Author: kaleko

.github/workflows/ash-security-scan.yml

@@ -1,6 +1,8 @@
 name: ASH Security Scan
 
 on:
+  push:
+    branches: [ main ]
   pull_request:
     branches: [ main ]
 

.github/workflows/js-lint.yml

@@ -1,6 +1,8 @@
 name: JavaScript/TypeScript Code Quality
 
 on:
+  push:
+    branches: [ main ]
   pull_request:
     branches: [ main ]
 

.github/workflows/python-lint.yml

@@ -1,6 +1,8 @@
 name: Python Code Quality
 
 on:
+  push:
+    branches: [ main ]
   pull_request:
     branches: [ main ]