pyinfra/operations: Fix removal of docker network

The wrong command was used when triggering removal of a network.

Author: lorenzph

pyinfra/operations/docker.py

@@ -288,7 +288,7 @@ def network(
 
         yield handle_docker(
             resource="network",
-            command="create",
+            command="remove",
             network=network,
         )
 

tests/operations/docker.network/remove_network.json

@@ -0,0 +1,14 @@
+{
+    "kwargs": {
+        "network": "nginx",
+        "present": false
+    },
+    "facts": {
+        "docker.DockerNetwork": {
+            "object_id=nginx": []
+        }
+    },
+    "commands": [
+        "docker network rm nginx"
+    ]
+}