Update npm tools deps (#1954) (#1955)

(cherry picked from commit 6c92867)

Co-authored-by: Martin Rademacher <mano@radebatz.net>

Author: github-actions[bot]

package.json

@@ -7,7 +7,7 @@
     "redocly": "redocly"
   },
   "devDependencies": {
-    "@stoplight/spectral-cli": "^6",
-    "@redocly/cli": "^1.30"
+    "@redocly/cli": "^2.5.1",
+    "@stoplight/spectral-cli": "^6.15.0"
   }
 }