fixed the typo in environment.yml

[JohnShiuMK]

@dorisyycai @meretelutz @jbarns14 found a bug in the environment.yml, this is the fix

[codecov[bot]]

Codecov Report

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

Comparison is base (f6a0de6) 90.47% compared to head (5e68de2) 90.47%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #39 +/- ## ======================================= Coverage 90.47% 90.47% ======================================= Files 5 5 Lines 63 63 ======================================= Hits 57 57 Misses 6 6 ```

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