Update schema.md

schema.md

@@ -60,16 +60,16 @@ General instructions for the agent go here.
 ### HF_ACTION: INSTALL requirements.txt
 
 ### File: app.py
-\`\`\`python
+```python
 import flask
 # code here
-\`\`\`
+\```
 
 ## File Structure
-\`\`\`
+\```
 .
 └── app.py
-\`\`\`
+\```
 ```
 ---