website/docs: add source property mappings, rework provider property mappings (#10652)

website/docs/releases/2024/v2024.8.md

@@ -32,6 +32,20 @@ To try out the release candidate, replace your Docker image tag with the latest
 
     **If you have any custom property mappings, we recommend migrating them to this new format.**
 
+-   **OAuth and SAML sources now sync groups by default**
+
+    OAuth (specifically OpenID and Okta) sources now sync groups by default when a `groups` claim is available.
+
+    SAML sources now sync groups by default when a `http://schemas.xmlsoap.org/claims/Group` attribute is available in the assertion.
+
+    To disable that behavior, create an OAuth/SAML source property mapping with the following expression:
+
+    ```python
+    return {
+        "groups": [],
+    }
+    ```
+
 ### Manual action may be required
 
 -   **Changes to the external user type**
@@ -50,6 +64,8 @@ To try out the release candidate, replace your Docker image tag with the latest
 
 ## New features
 
+-   **Source property mappings for SCIM, OAuth, SAML and Plex sources**
+
 -   **SAML Source encryption support**
 
     It is now possible to configure a SAML Source to decrypt and validate encrypted assertions. This can be configured by certaing a [Certificate-keypair](../../core/certificates.md) and selecting it in the SAML Source.