[skip e2e]Add ci-passed automaticaly for docs changed only (#15727)

Signed-off-by: Jenny Li <jing.li@zilliz.com>

.github/mergify.yml

@@ -44,6 +44,16 @@ pull_request_rules:
         add:
           - ci-passed
   
+  - name: Test passed for docs changed only
+    conditions:
+      - base=master
+      - -files~=^(?!.*\.(md)).*$ 
+    actions:
+      label:
+        add:
+          - ci-passed
+
+
   - name: Test passed for non go or c++ code changed
     conditions:
       - base=master
@@ -154,7 +164,7 @@ pull_request_rules:
     conditions:
       - base=master
       - -title~=\[skip e2e\]
-      - files~=^(?!internal\/.*_test\.go).*$
+      - files~=^(?!(internal\/.*_test\.go|.*\.md)).*$
       - "status-success!=continuous-integration/jenkins/pr-merge"        
     actions:
       label: