fix: lowercase the python language in code snippet (#1929)

Co-authored-by: Mackenzie Zastrow <zastrowm@users.noreply.github.com>

Author: zastrowm

src/strands/types/interrupt.py

@@ -16,7 +16,7 @@
     ```
 
 Example:
-    ```Python
+    ```python
     from typing import Any
 
     from strands import Agent, tool