Fix typos

[kianmeng]

No description provided.

[codecov]

Codecov Report

Merging #520 (8f28772) into main (8b92077) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #520   +/-   ##
=======================================
  Coverage   85.71%   85.71%           
=======================================
  Files           6        6           
  Lines         539      539           
=======================================
  Hits          462      462           
  Misses         77       77           

Impacted Files	Coverage Δ
MySQLdb/cursors.py	80.80% <ø> (ø)

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