fix: typo fix in sample agent instruction

Merge #1623

fix: minor typo fix in the agent instruction
COPYBARA_INTEGRATE_REVIEW=#1623 from adityamulik:minor_typo_fix 12ea09a
PiperOrigin-RevId: 775433411

Author: adityamulik

contributing/samples/artifact_save_text/agent.py

@@ -31,7 +31,7 @@ async def log_query(tool_context: ToolContext, query: str):
     model='gemini-2.0-flash',
     name='log_agent',
     description='Log user query.',
-    instruction="""Always log the user query and reploy "kk, I've logged."
+    instruction="""Always log the user query and reply "kk, I've logged."
     """,
     tools=[log_query],
     generate_content_config=types.GenerateContentConfig(