Update toggles docs

[hotinglok]

Resolves JIRA: N/A

There have been a few instances now where toggles behaviour seems to have been the cause of some confusion. I realised that a lot of useful information mentioned in different channels weren't actually documented in the codebase so I thought to update the docs.

Summary

• Updates toggles readme

Code changes

• N/A

Useful Links

• Coding Standards
• Repository use guidelines
• Add Links to useful resources related to this PR if applicable.