chore: update dependency @types/supertest to v6

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

Author: renovate[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "@types/fs-extra": "^11.0.4",
     "@types/shot": "^4.0.5",
     "@types/sinon": "^17.0.4",
-    "@types/supertest": "^2.0.16",
+    "@types/supertest": "^6.0.3",
     "express": "^4.21.2",
     "fs-extra": "^11.3.0",
     "oas-validator": "^5.0.8",