docs: fix a trivial typo in README.md

[musicinmybrain]

What do these changes do?

Fix a trivial typo in README.md – such was in place of such as.

Are there changes in behavior for the user?

No.

Related issue number

N/A, no issue opened.

Checklist

• I think the code is well written
• Unit tests for the changes exist N/A, no code changes.
• Documentation reflects the changes N/A, nothing to docuemnt.

[bdraco]

Thanks @musicinmybrain

[bdraco]

CI might take an hour or so to run since other aio-libs repos are using up all the runners

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.12%. Comparing base (186be05) to head (5a51c3d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #84      +/-   ##
===========================================
- Coverage   100.00%   98.12%   -1.88%     
===========================================
  Files            4        4              
  Lines          160      160              
  Branches        43       41       -2     
===========================================
- Hits           160      157       -3     
- Misses           0        2       +2     
- Partials         0        1       +1     

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