Update turbulent taylor couette time stepping in example

[blaisb]

Description

The Taylor-Couette example was using constant time-stepping and a BDF3 time-integrator. This is not a good practice for this example. I have updated the parameter file, the prm file and also the .png files of the results. The new results are much better especially for fine meshes.

Code related list:

• Lethe documentation is up to date
• The branch is rebased onto master
• Code is indented with indent-all and .prm files (examples and tests) with prm-indent
• Links are added to parent .rst files
• The example is following the standard format

Pull request related list:

• Labels are applied
• There are at least 2 reviewers (or 1 if small feature) excluding the responsible for the merge
• If this PR closes an issue or is related to a project, it is linked in the "Projects" or "Development" section
• If any future works is planed, an issue is opened
• The PR description is cleaned and ready for merge

[lpsaavedra]

Nice update to the example! I have only a few comments

[blaisb]

I applied all of your comments @lpsaavedra