Updating Okta provider instruction

[nasirhussenm]

Description

We need to update the Okta integration instructions in the customer documentation

Category

This is an issue with:

• errata (error in doc content)
• new doc (requires a completely new doc)
• update (add missing or refresh existing content)
• improvement (improve docs content or format)

Affected pages

https://github.com/sensu/sensu-docs/blob/main/content/sensu-go/6.11/operations/control-access/oidc-auth.md

Change needed

Adding OIDC spec attribute provider options i.e Okta,PingFederate,EntraID.

Additional context

Adding OIDC spec attribute provider options i.e Okta,PingFederate,EntraID in 6.12 documentation.