Prompt the user to select a container if they don't provide one

and we can't infer it.

docs/kubectl-log.md

@@ -24,6 +24,7 @@ $ kubectl log -f 123456-7890 ruby-container
 
 ```
   -f, --follow=false: Specify if the logs should be streamed.
+      --interactive=true: If true, prompt the user for input when required. Default true.
 ```
 
 ### Options inherrited from parent commands

docs/man/man1/kubectl-log.1

@@ -21,6 +21,10 @@ Print the logs for a container in a pod. If the pod has only one container, the
 \fB\-f\fP, \fB\-\-follow\fP=false
     Specify if the logs should be streamed.
 
+.PP
+\fB\-\-interactive\fP=true
+    If true, prompt the user for input when required. Default true.
+
 
 .SH OPTIONS INHERITED FROM PARENT COMMANDS
 .PP