[Docs] Add note that AGENTS.md is not reloaded after start #812
Description
Describe the feature or problem you'd like to solve
Copilot CLI does not reload the AGENTS.md file after it has been initialized, this is not mentioned anywhere.
Proposed solution
Add a section to the docs https://docs.github.com/en/copilot/how-tos/use-copilot-agents/use-copilot-cli#use-custom-instructions that states that if you edit the AGENTS.md file you need to quite and restart copilot cli.
Example prompts or workflows
No response
Additional context
No response