Added Catlab as dependency to docs Project.toml

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (781a54a) 49.93% compared to head (a44b4dc) 49.93%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## org-ci #98 +/- ## ======================================= Coverage 49.93% 49.93% ======================================= Files 9 9 Lines 1524 1524 ======================================= Hits 761 761 Misses 763 763 ```

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