Standardise title on OmniAuth pages - correction

doc/administration/auth/jwt.md

@@ -4,7 +4,7 @@ group: Authentication
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
 ---
 
-# Use JWT as an OAuth 2.0 authentication provider **(FREE SELF)**
+# Use JWT as an authentication provider **(FREE SELF)**
 
 To enable the JWT OmniAuth provider, you must register your application with JWT.
 JWT provides you with a secret key for you to use.

doc/administration/auth/oidc.md

@@ -4,7 +4,7 @@ group: Authentication
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
 ---
 
-# Use OpenID Connect as an OAuth 2.0 authentication provider **(FREE SELF)**
+# Use OpenID Connect as an authentication provider **(FREE SELF)**
 
 You can use GitLab as a client application with [OpenID Connect](https://openid.net/specs/openid-connect-core-1_0.html)
 as an OmniAuth provider.

doc/integration/kerberos.md

@@ -4,7 +4,7 @@ group: Authentication
 info: "To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments"
 ---
 
-# Use Kerberos as an OAuth 2.0 authentication provider **(FREE SELF)**
+# Integrate GitLab with Kerberos **(FREE SELF)**
 
 GitLab can integrate with [Kerberos](https://web.mit.edu/kerberos/) as an authentication mechanism.
 

doc/integration/shibboleth.md

@@ -4,7 +4,7 @@ group: Authentication
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Use Shibboleth as an OAuth 2.0 authentication provider **(FREE SELF)**
+# Use Shibboleth as an authentication provider **(FREE SELF)**
 
 NOTE:
 Use the [GitLab SAML integration](saml.md) to integrate specific Shibboleth identity providers (IdPs). For Shibboleth federation support (Discovery Service), use this document.

doc/integration/vault.md

@@ -4,7 +4,7 @@ group: Environments
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
 ---
 
-# Use Vault as a GitLab OpenID Connect authentication provider **(FREE ALL)**
+# Vault authentication with GitLab OpenID Connect **(FREE ALL)**
 
 [Vault](https://www.vaultproject.io/) is a secrets management application offered by HashiCorp.
 It allows you to store and manage sensitive information such as secret environment