GITBOOK-7: Add github teams docs

Author: Haarolean

configuration/rbac-role-based-access-control/README.md

@@ -70,7 +70,7 @@ A list of supported providers and corresponding subject fetch mechanism:
 
 * oauth: `user`, `role`
 * oauth\_google: `user`, `domain`
-* oauth\_github: `user`, `organization`
+* oauth\_github: `user`, `organization`, `team`
 * oauth\_cognito: `user`, `group`
 * ldap: `group`
 * ldap\_ad: (unsupported yet, see [Issue 54](https://github.com/kafbat/kafka-ui/issues/54))

configuration/rbac-role-based-access-control/supported-identity-providers.md

@@ -44,6 +44,9 @@ Set up github auth [first](../authentication/oauth2.md#github)
         - provider: oauth_github
           type: user
           value: "memelord"
+        - provider: oauth_github
+          type: team
+          value: "kafbat/backend"
 ```
 
 ### Cognito