docs: fix .env file path in Python Quickstart

[MuhammadHamidRaza]

Summary

Fix the .env file path in the Python Quickstart.

Problem

After running:

adk create my_agent

the guide instructs users to create the API key file with:

echo 'GOOGLE_API_KEY="YOUR_API_KEY"' > .env

At this point, the user is still in the parent directory, so the command creates ./.env.

However, the project structure shown earlier in the guide and the code block title (Update: my_agent/.env) indicate that the file should be located at my_agent/.env.

Solution

Update the commands for:

• macOS / Linux
• Windows PowerShell
• Windows Command Prompt

to write the file to:

my_agent/.env

This keeps the commands consistent with the documented project structure while preserving the existing Quickstart workflow.

Verification

The .env creation command now matches:

• the project structure shown in the guide, and
• the Update: my_agent/.env code block title.

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[MuhammadHamidRaza]

Hi @koverholt
look this is best for beginners