chore: update dependency diff to v9

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -48,7 +48,7 @@
     "@commitlint/config-conventional": "^20.5.3",
     "async": "^3.2.6",
     "colors": "^1.4.0",
-    "diff": "^8.0.4",
+    "diff": "^9.0.0",
     "doctoc": "^2.4.1",
     "duplexer": "^0.1.2",
     "eslint": "^9.39.4",