Document profileUrl in SCIM user attributes (#45903)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: mastersb

content/rest/scim/scim.md

@@ -73,6 +73,7 @@ Name | Type | Description
 `name.familyName`|`string` | The last name of the user.
 `emails` | `array` | List of user emails.
 `externalId` | `string` | This identifier is generated by the SAML provider, and is used as a unique ID by the SAML provider to match against a GitHub user. You can find the `externalID` for a user either at the SAML provider, or using the [List SCIM provisioned identities](#list-scim-provisioned-identities) endpoint and filtering on other known attributes, such as a user's GitHub username or email address.
+`profileUrl` | `string` | The URL of the {% data variables.product.github %} account linked to the SCIM identity. This attribute is omitted when the identity is not linked to a {% data variables.product.github %} account.
 `id` | `string` | Identifier generated by the GitHub SCIM endpoint.
 `active` | `boolean` | Used to indicate whether the identity is active (true) or should be deprovisioned (false).