Update docs/guide/function-implementation.md

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

Author: JohnRichard4096

docs/guide/function-implementation.md

@@ -124,7 +124,7 @@ async def on_post_process(self) -> None:
 
 #### Exception Handling Best Practices
 
-Since the default `on_exception()` method in [AgentStrategy](../api-reference/classes/AgentStrategy.md) no longer raises exceptions by default. This change provides more flexibility for custom error handling:
+The default `on_exception()` method in [AgentStrategy](../api-reference/classes/AgentStrategy.md) no longer raises exceptions by default. This change provides more flexibility for custom error handling:
 
 ```python
 from amrita_core.agent.strategy import AgentStrategy