Fix reference to WC_API_Server

[szepeviktor]

All Submissions:

• Have you followed the WooCommerce Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Was spelled "WC_API_SERVER"
From #37015 (comment)

Testing instructions

Please set up PHPStan. @phpstan discovered this problem.
Here is how #37015 (comment)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (987b4fe) 46.7% compared to head (96a5a79) 46.7%.
Report is 12353 commits behind head on trunk.

Additional details and impacted files

@@            Coverage Diff             @@
##             trunk   #37054     +/-   ##
==========================================
- Coverage     46.7%    46.7%   -0.0%     
  Complexity   17188    17188             
==========================================
  Files          429      429             
  Lines        64820    64821      +1     
==========================================
  Hits         30251    30251             
- Misses       34569    34570      +1     

see 1 file with indirect coverage changes

[szepeviktor]

@chihsuan Changelog added 🍏

[chihsuan]

Thanks @szepeviktor. I'll let @Konamiman review this PR. 🙏

[szepeviktor]

Upper/lowercase changes only!

[Konamiman]

Hi @szepeviktor, thanks for your contribution. Could you please add some testing instructions to the pull request description?

[szepeviktor]

Okay.

[Konamiman]

@szepeviktor Thanks but I meant testing instructions for WooCommerce itself. Is there some action that can be performed on a WooCommerce install, that fails without this fix but works once the fix is put in place?

[szepeviktor]

Is there some action that can be performed on a WooCommerce install, that fails without this fix but works once the fix is put in place?

@Konamiman No. PHP is a lenient language.