SAML: Add description for Graph API permissions step (#92408)

* Add description for permissions step

* Update docs/sources/setup-grafana/configure-security/configure-authentication/saml/index.md

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Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

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

@@ -241,7 +241,7 @@ This app registration will be used as a Service Account to retrieve more informa
 #### Set up permissions for the application
 
 1. In the overview pane, look for **API permissions** section and select **Add a permission**.
-1. In the **Request API permissions** pane, select **Microsoft Graph**.
+1. In the **Request API permissions** pane, select **Microsoft Graph**, and click **Application permissions**.
 1. In the **Select permissions** pane, under the **GroupMember** section, select **GroupMember.Read.All**.
 1. In the **Select permissions** pane, under the **User** section, select **User.Read**.
 1. Select **Add permissions** at the bottom of the page.