feat: upgrade @oclif/plugin-help from 5.2.20 to 6.2.20

Snyk has created this PR to upgrade @oclif/plugin-help from 5.2.20 to 6.2.20.

See this package in npm:
@oclif/plugin-help

See this project in Snyk:
https://app.snyk.io/org/contentstack-devex/project/4aa0f33f-192a-4a1d-a2e9-78e133da96f2?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -24,7 +24,7 @@
     "@contentstack/cli-command": "~1.3.2",
     "@contentstack/cli-utilities": "~1.8.0",
     "@oclif/core": "^3.27.0",
-    "@oclif/plugin-help": "^5.2.20",
+    "@oclif/plugin-help": "^6.2.20",
     "@oclif/plugin-plugins": "^5.4.15",
     "@types/express": "^4.17.21",
     "@types/express-serve-static-core": "^4.17.34",