chore: update readme install cmd (#17)

Author: averikitsch

README.md

@@ -17,7 +17,7 @@ Learn more about [Gemini CLI Extensions](https://github.com/google-gemini/gemini
 
 Before you begin, ensure you have the following:
 
-*   [Gemini CLI](https://github.com/google-gemini/gemini-cli) installed with version +v0.6.0.
+*   [Gemini CLI](https://github.com/google-gemini/gemini-cli) installed with version **+v0.6.0**.
 *   A Google Cloud project with the **BigQuery API** enabled.
 *   IAM Permissions:
     *   BigQuery User (`roles/bigquery.user`) (for executing queries and view
@@ -28,7 +28,7 @@ Before you begin, ensure you have the following:
 To install the extension, use the command:
 
 ```bash
-gemini extensions install github.com/gemini-cli-extensions/bigquery-data-analytics
+gemini extensions install https://github.com/gemini-cli-extensions/bigquery-data-analytics
 ```
 
 ## Configuration