Properly send in params in the Python API example

What changes are you introducing?

Python's requests library accepts a dict with params and then properly encodes this to be sent to a server. This avoids the need to manually encode this in our examples.

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

This fixes a build issue in Red Hat's downstream where Pantheon fails on &, but generally is safer and more understandable code.

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

This is an alternative to https://github.com/theforeman/foreman-documentation/pull/3405.

I must admit I haven't tried this on a real system and is solely written based on knowing Python and requests.

Checklists

[x] I am okay with my commits getting squashed when you merge this PR.
[x] I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

[x] Foreman 3.12/Katello 4.14 (Satellite 6.16)
[ ] Foreman 3.11/Katello 4.13
[ ] Foreman 3.10/Katello 4.12
[ ] Foreman 3.9/Katello 4.11 (Satellite 6.15; orcharhino 6.8/6.9/6.10)
[ ] Foreman 3.8/Katello 4.10
[ ] Foreman 3.7/Katello 4.9 (Satellite 6.14)
[ ] Foreman 3.6/Katello 4.8
[ ] Foreman 3.5/Katello 4.7 (Satellite 6.13; orcharhino 6.6/6.7)
We do not accept PRs for Foreman older than 3.5.

theforeman / foreman-documentation

Properly send in params in the Python API example #3406

What changes are you introducing?

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

Checklists