Update outdated configuration options in documentation

[SeanBryan51]

Fixes #269

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.97%. Comparing base (59910ed) to head (bb0ab3d).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #290      +/-   ##
==========================================
- Coverage   72.81%   69.97%   -2.84%     
==========================================
  Files          18       18              
  Lines         982      986       +4     
==========================================
- Hits          715      690      -25     
- Misses        267      296      +29     

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[SeanBryan51]

Preview link for documentation: https://benchcab--290.org.readthedocs.build/en/290/

[ccarouge]

I've just seen this. While you are at it, would you mind correcting the last line in the repo description:

### [repo](#repo)

Contains settings to specify the CABLE branch to test against. 

This key is _required_. The `repo` key must specify either the [`svn`](#+repo.svn) key or the [`git`](#+repo.git) key.

With:

This key is _required_. The `repo` key must specify the [`svn`](#+repo.svn), the [`git`](#+repo.git) or the [`local`](#+repo.local) key.