Broken link to Python commands doc

[faucomte97]

Describe the bug
The "Help" popup in the Python levels has a broken link to our Python commands docs.

To Reproduce
Steps to reproduce the behaviour:

1. Go to level 92.
2. Click "Help".
3. Click "the full list of commands".
4. Notice that the link leads to a broken page on Gitbook.

Expected behaviour
The link should redirect to the right page.
This is the correct link: https://code-for-life.gitbook.io/rapid-router/rapid-router-python-commands

Screenshots

[lauracumming]

Not sure where to find the link to test

[evemartin]

There's one of these links in the hint for Python Den level 42!

[lauracumming]

LGTM

Although shouldn't all of this just be in the student section? Is it accessible for users that aren't logged in?

[SKairinos]

Some redundancy in the title + routing.

https://code-for-life.gitbook.io/rapid-router/rapid-router-python-commands

Could just be simplified to

https://code-for-life.gitbook.io/rapid-router/python-commands