fix: upgrade joi from 17.5.0 to 17.6.0

Snyk has created this PR to upgrade joi from 17.5.0 to 17.6.0.

See this package in npm:
https://www.npmjs.com/package/joi

See this project in Snyk:
https://app.snyk.io/org/auth0-sdks/project/6f208f8a-3e29-4856-854f-8753f0b49091?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -32,7 +32,7 @@
     "debug": "^4.3.3",
     "futoin-hkdf": "^1.5.0",
     "http-errors": "^1.8.1",
-    "joi": "^17.5.0",
+    "joi": "^17.6.0",
     "jose": "^2.0.5",
     "on-headers": "^1.0.2",
     "openid-client": "^4.9.1",