Fix workflows triggering on tag pushes

Add branch filter to prevent workflows from running on tag pushes,
which caused failures due to empty github.head_ref and immutable tag refs.

Author: iqbalhasandev

.github/workflows/fix-php-code-style-issues.yml

@@ -2,6 +2,8 @@ name: Fix PHP code style issues
 
 on:
   push:
+    branches:
+      - '**'
     paths:
       - "**.php"
   pull_request:

.github/workflows/phpstan.yml

@@ -2,6 +2,8 @@ name: PHPStan
 
 on:
   push:
+    branches:
+      - '**'
     paths:
       - "**.php"
       - "phpstan.neon.dist"

.github/workflows/run-tests.yml

@@ -2,6 +2,8 @@ name: run-tests
 
 on:
   push:
+    branches:
+      - '**'
     paths:
       - "**.php"
       - ".github/workflows/run-tests.yml"