fix(tests): correct typo in skip message ('skiping' -> 'skipping')

[bowale01]

Description

Fixed a typo in test/integration/isolated/skip.go — "skiping" → "skipping" in the SkipIfRouterNotExpressions function's skip message.

Type of change

• Bug fix (non-breaking change which fixes an issue)

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.0%. Comparing base (21fec8b) to head (435a587).

❗ There is a different number of reports uploaded between BASE (21fec8b) and HEAD (435a587). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (21fec8b)	HEAD (435a587)
	2	1

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #8070      +/-   ##
========================================
- Coverage   80.6%   59.0%   -21.6%     
========================================
  Files        222     222              
  Lines      20992   20992              
========================================
- Hits       16920   12395    -4525     
- Misses      3008    7872    +4864     
+ Partials    1064     725     -339     

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