Documetation Update - Add detailed cloud sync branch merge process

[poojithap11]

Code of Conduct

• I have read and agree to the Insomnia Docs project's Code of Conduct.

What article on docs.insomnia.rest is affected?

Cloud Sync --> https://docs.insomnia.rest/insomnia/insomnia-sync

What part(s) of the article would you like to see updated?

Add a clear step-by-step guide on how to properly merge changes from a feature or dev branch (e.g., test) into the master branch using the cloud sync feature. This should include:

1. Creating and committing changes in a new branch
2. Switching back to the master branch before initiating a merge
3. Using the Merge button next to the feature branch to sync changes

Additional information

No response

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