azure: trigger only on source code changes

Change-Id: Ib88ee6639f73b250823d037eda376e065854f301

Author: Stricted

azure-pipelines.yml

@@ -4,6 +4,25 @@ trigger:
     include:
       - PHP-7.4
       - master
+  paths:
+    exclude:
+      - docs/*
+      - appveyor/*
+      - azure/*
+      - travis/*
+      - .appveyor.yml
+      - .editorconfig
+      - .gdbinit
+      - .gitattributes
+      - .gitignore
+      - .travis.yml
+      - EXTENSIONS
+      - LICENSE
+      - NEWS
+      - UPGRADING
+      - UPGRADING.INTERNALS
+      - azure-pipelines.yml
+      - *.md
 
 jobs:
   - template: azure/job.yml