[#6656] Fix syntax to comply with docs standards

Author: wouterj

cookbook/logging/channels_handlers.rst

@@ -97,7 +97,10 @@ in all environments, or just ``config_prod.yml`` to happen only in ``prod``:
 
 .. caution::
 
-    The 'channels' configuration only works for top level handlers. Handlers that are nested inside a Group, Buffer, Filter, FingersCrossed, or other such Handler will ignore this configuration and will process every message passed to them.
+    The ``channels`` configuration only works for top level handlers. Handlers
+    that are nested inside a group, buffer, filter, fingers crossed or other
+    such handler will ignore this configuration and will process every message
+    passed to them.
 
 YAML Specification
 ------------------