Correct two typos

[goggle]

Corrects two typos.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (efdc576) 92.21% compared to head (798c9be) 92.21%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #25 +/- ## ======================================= Coverage 92.21% 92.21% ======================================= Files 4 4 Lines 1041 1041 ======================================= Hits 960 960 Misses 81 81 ``` | [Impacted Files](https://codecov.io/gh/typst/ecow/pull/25?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=typst) | Coverage Δ | | |---|---|---| | [src/lib.rs](https://codecov.io/gh/typst/ecow/pull/25?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=typst#diff-c3JjL2xpYi5ycw==) | `100.00% <ø> (ø)` | | | [src/dynamic.rs](https://codecov.io/gh/typst/ecow/pull/25?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=typst#diff-c3JjL2R5bmFtaWMucnM=) | `97.82% <100.00%> (ø)` | |

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[laurmaedje]

Thanks!