fix: update testPathPattern to testPathPatterns for Jest 30

Jest 30 (upgraded in PR #580) renamed --testPathPattern to
--testPathPatterns, breaking all 3 chroot integration test jobs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Mossaka

.github/workflows/test-chroot.yml

@@ -78,7 +78,7 @@ jobs:
       - name: Run chroot language tests
         run: |
           echo "=== Running chroot language tests ==="
-          npm run test:integration -- --testPathPattern="chroot-languages" --verbose
+          npm run test:integration -- --testPathPatterns="chroot-languages" --verbose
         env:
           JEST_TIMEOUT: 180000
 
@@ -199,7 +199,7 @@ jobs:
       - name: Run chroot package manager tests
         run: |
           echo "=== Running chroot package manager tests ==="
-          npm run test:integration -- --testPathPattern="chroot-package-managers" --verbose
+          npm run test:integration -- --testPathPatterns="chroot-package-managers" --verbose
         env:
           JEST_TIMEOUT: 300000
 
@@ -255,7 +255,7 @@ jobs:
       - name: Run chroot edge case tests
         run: |
           echo "=== Running chroot edge case tests ==="
-          npm run test:integration -- --testPathPattern="chroot-edge-cases" --verbose
+          npm run test:integration -- --testPathPatterns="chroot-edge-cases" --verbose
         env:
           JEST_TIMEOUT: 180000