Documentation: typo value not in code #843

[XinShen-CHN]

Proposed changes

Typo revision.

Types of changes

What types of changes does your code introduce to FESTIM?

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Code refactoring
• [x] Documentation Update (if none of the other choices apply)
• [ ] New tests

Checklist

• [ ] Black formatted
• [ ] Unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.56%. Comparing base (31864c8) to head (61dcf2d). Report is 72 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #858 +/- ## ======================================= Coverage 99.55% 99.56% ======================================= Files 61 61 Lines 2724 2750 +26 ======================================= + Hits 2712 2738 +26 Misses 12 12 ```

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