chore: simplify sentence (#14072)

docs/development/behavior.md

@@ -35,7 +35,7 @@ In other words, if someone's taking the time to help you, "don't be lazy".
 
 If someone's helped you get some functionality working, or successfully troubleshoot a problem, please try to do this:
 
-- Confirm which advice fixed your problem, if it's unclear
+- Let us know which advice fixed your problem, if it's unclear
 - If you're feeling polite, thank the person who helped you
 - If you're feeling helpful, submit a Pull Request to improve the relevant documentation