Update trigger.markdown (home-assistant#16257)

Co-authored-by: Franck Nijhof <[email protected]>

source/_docs/automation/trigger.markdown

@@ -99,7 +99,7 @@ automation:
 
 <div class='note'>
 Listing above and below together means the numeric_state has to be between the two values.
-In the example above, the trigger would fire if a numeric_state goes to 17.1-24.9 (from strict above 17 and strict below 25).
+In the example above, the trigger would fire a single time if a numeric_state goes into to 17.1-24.9 range (from 17 and below or 25 and above). It will only fire again, once it has left the defined range and enters it again.
 </div>
 
 The `for:` can also be specified as `HH:MM:SS` like this: