[BUG] Bot should ignore / commands that are embedded in code

[asmacdo]

Describe the bug
When putting a / command in a code segment, the bot should not follow the command.

/approve

To Reproduce
I just did! The bot should reply with an erroneous comment, see below :)

[asmacdo]

/lgtm

[github-actions]

Cannot apply the lgtm label because Error: asmacdo is not a org member or collaborator

[jpmcb]

Hmmmm interesting! Thanks for this feedback - I think this is something we could do easily!

/assign

Let's give this a quick try:

/close

[jpmcb]

Interesting! Yeah, I think ignoring slash commands in code blocks makes sense. I'm happy to take this on 👏🏼