Fix ci.yml

Author: thanthtooaung-coding

.github/workflows/ci.yml

@@ -40,9 +40,4 @@ jobs:
               exit 1
             fi
           fi
-        done
-
-    - name: Validate markdown files
-      uses: DavidAnson/markdownlint-cli2-action@v11
-      with:
-        globs: "**/*.md" 
+        done