fix(canvas-lms): markdown code and feedback buttons

[alexdalat]

🔧 What does this fix? 🔧

Fixes unthemed styling for markdown code and feedback buttons

🗒 Checklist 🗒

• I have read and followed Catppuccin's contributing guidelines.

[uncenter]

https://userstyles.catppuccin.com/contributing/#opinionated-changes

Suggested change

font-weight: 500;

[uncenter]

Suggested change

	code {
	padding: 0.2em 0.4em;
	font-size: 85%;
	}

https://userstyles.catppuccin.com/contributing/#opinionated-changes

[pynappo]

I don't have access to the markdown code editor in either canvas.instructure.com or {my-university}.instructure.com (assuming it's the same one as noted in https://lts-help.its.virginia.edu/m/integrated-tools/l/1653310-how-do-i-format-text-with-markdown-in-the-rich-content-editor), @alexdalat could I get a before/after screenshot?

[alexdalat]

Before:

After:

I'm currently swamped with finals preparation, so I haven't been able to give this as much attention as I'd like...
I also threw an LLM band-aid so I can make my assignment page readable (seen above). I'll do my best to come back to this once I am done in a couple weeks.
Thank you for your continued maintenance on this project!