chore: inverse wording of error message

[hecktarzuli]

Original wording didn't seem to make sense.

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

Error message seemed to be wrong

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-io]

Codecov Report

Merging #5990 into next will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             next    #5990      +/-   ##
==========================================
- Coverage   95.72%   95.68%   -0.04%     
==========================================
  Files          82       82              
  Lines        2689     2689              
  Branches      690      690              
==========================================
- Hits         2574     2573       -1     
- Misses         97       98       +1     
  Partials       18       18

Flag	Coverage Δ
#e2e	100% <ø> (ø)	⬆️
#fixtures	50.35% <ø> (ø)	⬆️
#unit	92.67% <ø> (-0.04%)	⬇️

Impacted Files	Coverage Δ
packages/vue-renderer/src/renderer.js	93.49% <ø> (-0.82%)	⬇️

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