Fix doc project instantiation

[codecov[bot]]

Codecov Report

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

Project coverage is 75.46%. Comparing base (38f393d) to head (82146c6). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #279 +/- ## ======================================= Coverage 75.46% 75.46% ======================================= Files 11 11 Lines 750 750 ======================================= Hits 566 566 Misses 184 184 ``` | [Flag](https://app.codecov.io/gh/JuliaTesting/Aqua.jl/pull/279/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/JuliaTesting/Aqua.jl/pull/279/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting) | `75.46% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting#carryforward-flags-in-the-pull-request-comment) to find out more.

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