style: auto-fix markdown formatting

Author: github-actions[bot]

lint-fail-test.md

@@ -1,13 +1,15 @@
-#Auto-Fixable Header (No space after hash)
+# Auto-Fixable Header (No space after hash)
 
-This paragraph has trailing spaces at the end.    
+This paragraph has trailing spaces at the end.
 
 # Duplicate Header
+
 Content A
 
 # Duplicate Header
+
 Content B (Linter won't be able to fix the duplicate header but should point it out)
 
 <div class="error">
   Inline HTML is also not auto-fixable
-</div>
+</div>