adk-sql-agent instantiates the root_agent with incorrect name

[stevewalker-de]

https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/blob/main/samples/adk-sql-agent/sql_agent/agent.py

see 'weather_time_agent', below. should be 'adk-sql-agent'

this results in slightly confusing logging messages like "[weather_time_agent]: Now that the database is created, I will create the pets table. I will include columns for id, name, breed, and age."

root_agent = Agent(
name="weather_time_agent",
model="gemini-2.0-flash",
description=DESCRIPTION,
instruction=SYSTEM_PROMPT,
tools=[run_sql_tool, create_database_tool],
)