[v11.0.x] Docs: Create the Azure AD application section has outdated information. (#87034)

Docs: Create the Azure AD application section has outdated information. (#71498)

Update index.md

(cherry picked from commit ccd2bff8b0)

Co-authored-by: Dai Nguyen <88277570+ej25a@users.noreply.github.com>

docs/sources/setup-grafana/configure-security/configure-authentication/azuread/index.md

@@ -49,7 +49,7 @@ To enable the Azure AD OAuth2, register your application with Azure AD.
 1. Click **Certificates & secrets**, then add a new entry under **Client secrets** with the following configuration.
 
    - Description: Grafana OAuth
-   - Expires: Never
+   - Expires: Select an expiration period
 
 1. Click **Add** then copy the key value. This is the OAuth client secret.