chore: Update typo in README

[vincetran]

Issue #

N/A

Description

Fixed a typo I ran into when going through the README

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.52%. Comparing base (806a75c) to head (98680de).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3859      +/-   ##
==========================================
+ Coverage   68.50%   68.52%   +0.01%     
==========================================
  Files        1082     1082              
  Lines       37699    37699              
==========================================
+ Hits        25827    25833       +6     
+ Misses      11872    11866       -6     

Flag	Coverage Δ
API_plugin_unit_test	69.32% <ø> (ø)
AWSPluginsCore	68.53% <ø> (ø)
Amplify	47.56% <ø> (ø)
Analytics_plugin_unit_test	84.52% <ø> (ø)
Auth_plugin_unit_test	79.19% <ø> (-0.20%)	⬇️
DataStore_plugin_unit_test	82.19% <ø> (+0.38%)	⬆️
Geo_plugin_unit_test	72.00% <ø> (ø)
Logging_plugin_unit_test	62.95% <ø> (ø)
Predictions_plugin_unit_test	36.86% <ø> (ø)
PushNotifications_plugin_unit_test	86.21% <ø> (ø)
Storage_plugin_unit_test	76.81% <ø> (ø)
unit_tests	68.52% <ø> (+0.01%)	⬆️

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