Update upstream source from tag 'debian/upstream/1.4.3'

Update to upstream version '1.4.3'
with Debian dir 5d705e553436af21a342fad000978b1f4f45899f

PKG-INFO

 Metadata-Version: 2.1
 Name: swh.deposit
-Version: 1.4.2
+Version: 1.4.3
 Summary: Software Heritage Deposit Server
 Home-page: https://forge.softwareheritage.org/source/swh-deposit/
 Author: Software Heritage developers

swh.deposit.egg-info/PKG-INFO

 Metadata-Version: 2.1
 Name: swh.deposit
-Version: 1.4.2
+Version: 1.4.3
 Summary: Software Heritage Deposit Server
 Home-page: https://forge.softwareheritage.org/source/swh-deposit/
 Author: Software Heritage developers

swh/deposit/settings/production.py

@@ -134,7 +134,10 @@ if cfg_azure:
     object_parameters = {}
     for optional_config_key in ["content_type", "content_disposition"]:
         if optional_config_key in cfg_azure:
-            object_parameters[optional_config_key] = cfg_azure[optional_config_key]
+            value = cfg_azure[optional_config_key]
+            # Explicit "" as None instead of empty string which is not interpreted
+            # correctly
+            object_parameters[optional_config_key] = None if not value else value
 
     options.update(dict(object_parameters=object_parameters))