gh-38445: some typos
just fixing a lot of typos (found using codespell)
### :memo: Checklist
- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
URL: https://github.com/sagemath/sage/pull/38445
Reported by: Frédéric Chapoton
Reviewer(s): David Coudert
