Add missing API doc links for Object Storage global quotas

Author: mawilk90

linode_api4/groups/object_storage.py

@@ -539,7 +539,7 @@ def global_quotas(self, *filters):
         """
         Lists the active account-level Object Storage quotas applied to your account.
 
-        API Documentation: TBD
+        API Documentation: https://techdocs.akamai.com/linode-api/reference/get-object-storage-global-quotas
 
         :param filters: Any number of filters to apply to this query.
                         See :doc:`Filtering Collections</linode_api4/objects/filtering>`

linode_api4/objects/object_storage.py

@@ -622,7 +622,7 @@ class ObjectStorageGlobalQuota(Base):
     """
     An account-level Object Storage quota.
 
-    API documentation: TBD
+    API documentation: https://techdocs.akamai.com/linode-api/reference/get-object-storage-global-quota
     """
 
     api_endpoint = "/object-storage/global-quotas/{quota_id}"