Types of changes

Correct equations, references, bullet points, etc rendering in documentation.
No code modification.

Motivation and context / Related issue

There are many mistakes in the current documentation https://pythonot.github.io/

How has this been tested (if it applies)

PR checklist

• I have read the CONTRIBUTING document.
• The documentation is up-to-date with the changes I made (check build artifacts).
• All tests passed, and additional code has been covered with new tests.
• I have added the PR and Issue fix to the RELEASES.md file.