updated directory path

Author: s-polly

docfx.json

@@ -981,8 +981,8 @@
         "articles/ai-studio/**/*.yml": "ce-skilling-ai-copilot",
         "articles/search/**/*.md": "ce-skilling-ai-copilot",
         "articles/search/**/*.yml": "ce-skilling-ai-copilot",
-        "articles/machine-learning/*.md": "ce-skilling-ai-copilot",
-        "articles/machine-learning/*.yml": "ce-skilling-ai-copilot"
+        "articles/machine-learning/**/.md": "ce-skilling-ai-copilot",
+        "articles/machine-learning/**/.yml": "ce-skilling-ai-copilot"
       },
       "ms.service": {
         "articles/advisor/**/*.md": "advisor",