chore(deps): update dependency c8 to v11

Author: renovate[bot]

package.json

@@ -44,7 +44,7 @@
     "@stylistic/eslint-plugin-js": "^4.4.1",
     "@types/node": "^25.3.2",
     "@types/semver": "^7.7.1",
-    "c8": "^10.1.3",
+    "c8": "^11.0.0",
     "cleaner-spec-reporter": "^1.0.3",
     "eslint": "^10.0.2",
     "semver": "^7.7.4",