Correct example of selecting profile from cli (#2380)

Fixes: #2266

Author: ssbarnea

src/ansiblelint/generate_docs.py

@@ -136,7 +136,7 @@ def profiles_as_md(header: bool = False) -> str:
 you want to use. These profiles stack on top of each other, allowing you to
 gradually raise the quality bar.
 
-To run it with the most strict profile just type `ansible-lint -P production`.
+To run it with the most strict profile just type `ansible-lint --profile=production`.
 
 If you want to consult the list of rules from each profile, type
 `ansible-lint -P`. For your convenience, we also list the same output below.