fix(patch): add instruction for handling patch failures

Author: phodal

exts/devins-lang/src/main/resources/agent/toolExamples/patch.devin

@@ -5,3 +5,5 @@ Index: src/main/route.py
 +++ src/main/route.py	(revision 2)
 // GNU unified diff format structure
 ```
+
+If patch failured, please use write command