Also fix docker_api connection plugin.

changelogs/fragments/243-docker_container_exec-chdir.yml

@@ -1,2 +1,3 @@
 bugfixes:
   - "docker_container_exec - ``chdir`` is only supported since Docker SDK for Python 3.0.0. Make sure that this option can only use when 3.0.0 or later is installed, and prevent passing this parameter on when ``chdir`` is not provided to this module (https://github.com/ansible-collections/community.docker/pull/243, https://github.com/ansible-collections/community.docker/issues/242)."
+  - "docker_api connection plugin - avoid passing an unnecessary argument to a Docker SDK for Python call that is only supported by version 3.0.0 or later (https://github.com/ansible-collections/community.docker/pull/243)."

plugins/connection/docker_api.py

@@ -164,7 +164,7 @@ def exec_command(self, cmd, in_data=None, sudoable=False):
             stderr=True,
             stdin=need_stdin,
             user=self._play_context.remote_user or '',
-            workdir=None,
+            # workdir=None,  - only works for Docker SDK for Python 3.0.0 and later
         ))
         exec_id = exec_data['Id']