cogs.factoids: Update bot replies

[asher-the-thrasher]

Description

If a factoid is sent and replies to a bot message that is already replying to a message, have the new factoid reply to the original message.

Motivation and Context

suggestion from the discord https://discord.com/channels/348973006581923840/376042662580715521/945818314633007234

How Has This Been Tested?

Tested on my own personal bot that was built based off the factoids code from OBS bot so the main code is the same and lines up with the OBS bot code.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• [ ] My code has been run through clang-format.
• [x] I have read the contributing document.
• [x] My code is not on the master branch.
• [x] The code has been tested.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] I have included updates to all appropriate documentation.