FR: Fix endpoint from v2beta1 to v2

[sonatard]

• Firebase SDK version: master and v4 branch
• Firebase Product: auth

firebase-admin-go/auth/tenant_mgt.go

Line 30 in 4343fa8

tenantMgtEndpoint = "https://identitytoolkit.googleapis.com/v2beta1"

firebase-admin-go/auth/provider_config.go

Line 31 in 4343fa8

providerConfigEndpoint = "https://identitytoolkit.googleapis.com/v2beta1"

https://cloud.google.com/identity-platform/docs/reference/rest/v2/projects.tenants/create

https://identitytoolkit.googleapis.com/v2/

Please let me know if you have a reason to use beta.

[hiranya911]

I believe at the time v2 did not exist.

[hiranya911]

I'm going to close this as we don't see an immediate need to make this change. The upgrade will happen naturally in a future release, as we onboard new features into the Admin SDK.

[sonatard]

Fixed

#412