test: loosen path assert on windows

Author: ntnyq

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        node: [22.x, 24.x]
+        node: [22.x, 24.x, 26.x]
       fail-fast: false
     steps:
       - uses: actions/checkout@v6

tests/cli-parity.test.ts

@@ -186,7 +186,7 @@ it('should fail when linting files under package with invalid nested config', as
 
   expect(result.messages.length).toBeGreaterThan(0)
   expect(result.messages[0]?.message).toContain('Failed to format file:')
-  expect(result.messages[0]?.message).toContain('packages/a/index.ts')
+  expect(result.messages[0]?.message).toMatch(/packages[\\/]+a[\\/]+index\.ts/)
 })
 
 it('should not read nested config when disableNestedConfig is true', async () => {