Documentation: update installation command in destination docs

[burnash]

Background

The current documentation for installing packages with extras (e.g., pip install dlt[duckdb]) does not use quotes around the command in some of Destinations docs. Example: Google BigQuery

This can lead to potential errors or unexpected behavior in certain shell environments due to the way special characters, like square brackets, are interpreted.

Task

Update the installation command so it uses quotes (e.g., pip install "dlt[duckdb]"):

1. In our Destinations docs.
2. Search other documentation pages and update installation command accordingly.

Relevant Issues

• fix command to install dlt #1404.