(📚) fix docs for invalid-X-returns

[KotlinIsland]

Summary

There is no class integer in python, nor is there a type integer, so I updated the docs to remove the backticks on these references, such that it is the representation of an integer, and not a reference.

Test Plan

[charliermarsh]

Thanks, I caught a few of these but clearly not all, appreciate it.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.