docs(vault-jwt): update OIDC docs link (#388)

Co-authored-by: M Atif Ali <atif@coder.com>

vault-jwt/README.md

@@ -10,7 +10,7 @@ tags: [helper, integration, vault, jwt, oidc]
 
 # Hashicorp Vault Integration (JWT)
 
-This module lets you authenticate with [Hashicorp Vault](https://www.vaultproject.io/) in your Coder workspaces by reusing the [OIDC](https://coder.com/docs/admin/auth#openid-connect) access token from Coder's OIDC authentication method. This requires configuring the Vault [JWT/OIDC](https://developer.hashicorp.com/vault/docs/auth/jwt#configuration) auth method.
+This module lets you authenticate with [Hashicorp Vault](https://www.vaultproject.io/) in your Coder workspaces by reusing the [OIDC](https://coder.com/docs/admin/users/oidc-auth) access token from Coder's OIDC authentication method. This requires configuring the Vault [JWT/OIDC](https://developer.hashicorp.com/vault/docs/auth/jwt#configuration) auth method.
 
 ```tf
 module "vault" {