ci: skip Azure pipeline for docs-only changes

Add push and pull request path filters so docs-only changes do not trigger the Azure build matrix.

Author: moluopro

azure-pipelines.yml

@@ -4,6 +4,15 @@ trigger:
   branches:
     include:
       - develop
+  paths:
+    exclude:
+      - 'docs/**'
+      - '**/*.md'
+pr:
+  paths:
+    exclude:
+      - 'docs/**'
+      - '**/*.md'
 resources:
   containers:
       - container: oneapi-hpckit