Update README.md - Use consistent naming

[ghost]

Description

Motivation and Context

How Has This Been Tested?

Example Output or Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #421 (9386498) into main (b88a1fe) will increase coverage by 0.17%. Report is 1 commits behind head on main. The diff coverage is 84.67%.

@@             Coverage Diff              @@
##               main     #421      +/-   ##
============================================
+ Coverage     78.71%   78.89%   +0.17%     
- Complexity     2248     2304      +56     
============================================
  Files           214      218       +4     
  Lines          6071     6207     +136     
============================================
+ Hits           4779     4897     +118     
- Misses         1292     1310      +18     

Files Changed	Coverage Δ
src/Users/ClientFactory.php	0.00% <0.00%> (ø)
src/Users/Filter/UserFilter.php	73.07% <73.07%> (ø)
src/Users/Client.php	81.48% <81.48%> (ø)
src/Client.php	22.22% <100.00%> (+0.36%)	:arrow_up:
src/Entity/IterableAPICollection.php	77.24% <100.00%> (+2.24%)	:arrow_up:
src/Users/User.php	100.00% <100.00%> (ø)

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