fix(utils): Router config trailingSlash causes error with dynamic nuxt-child routes

[ms-fadaei]

Types of changes

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

Description

fix #9472
This bug existed because trailingSlash = true not been considered in a specific condition and exists regex missed it!

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #9505 (267373f) into dev (eb6bd9f) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev    #9505      +/-   ##
==========================================
- Coverage   65.15%   65.12%   -0.04%     
==========================================
  Files          94       94              
  Lines        4107     4109       +2     
  Branches     1125     1126       +1     
==========================================
  Hits         2676     2676              
- Misses       1153     1154       +1     
- Partials      278      279       +1     

Flag	Coverage Δ
unittests	65.12% <0.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/utils/src/route.js	85.18% <0.00%> (-1.07%)	⬇️

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[pi0]

Thanks! <3