Fix Typos in Documentation and Sample Files

[leopardracer]

Description:
This pull request corrects several typos and improves clarity in the documentation and sample files:

• Fixed the spelling of "provision" in the Ansible README.
• Corrected "Unix timestamp" formatting and added a helpful link in the RPC reference documentation.
• Fixed the spelling of "transition" in the tutorial sample YAML file.

These changes improve the accuracy and readability of the documentation. No functional code changes are included.