[cloud] Fix a minor doc error in docker_container module (#21033)

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

@@ -309,7 +309,7 @@ options:
       - "Use docker CLI syntax: C(8000), C(9000:8000), or C(0.0.0.0:9000:8000), where 8000 is a
         container port, 9000 is a host port, and 0.0.0.0 is a host interface."
       - Container ports must be exposed either in the Dockerfile or via the C(expose) option.
-      - A value of ALL will publish all exposed container ports to random host ports, ignoring
+      - A value of all will publish all exposed container ports to random host ports, ignoring
         any other mappings.
       - If C(networks) parameter is provided, will inspect each network to see if there exists
         a bridge network with optional parameter com.docker.network.bridge.host_binding_ipv4.