Fix invalid fields in module DOCUMENATION (#22297)

* fix module doc fields

* More module docs corrections

* More module docs corrections

* More module docs corrections

* More module docs corrections

* correct aliases

* Review comments

* Must quote ':'

* More authors

* Use suboptions:

* restore type: bool

* type should be in the same place

* More tidyups

* authors

* Use suboptions

* revert

* remove duplicate author

* More issues post rebase

lib/ansible/modules/cloud/docker/docker_container.py

@@ -185,7 +185,7 @@ options:
   kill_signal:
     description:
       - Override default signal used to kill a running container.
-    default null:
+    default: null
     required: false
   kernel_memory:
     description: