Update README.md with clarification on +1 comments (#1374)

README.md

@@ -44,7 +44,7 @@ A: We encourage you to open an issue, even if you’ve requested it before via o
 
 **Q: Can I "+1" existing issues?**
 
-A:We strongly encourage you to do so, as it helps us understand which issues will have the widest impact. You can navigate to the issue details page and add a reaction (thumbs up). There are six types of reactions supported (thumbs down “-1”, confused, heart, watching, laugh, hooray, and thumbs up +1). We can typically do 8-10 items per month with all necessary regression testing, and we want you to help us decide which items will benefit you the most.
+A: We strongly encourage you to vote on issues, as it helps us understand which issues will have the widest impact, but please don't leave comments saying "+1". Such comments generate noise for people receiving notifications, and issues can't be sorted by number of "+1" comments. Instead, leave a 👍 reaction, which is less noisy and can be used to sort issues for prioritization. To leave a reaction, navigate to the issue details page and add a reaction with the 😀 button on the post. There are six types of reactions supported (thumbs down "-1", confused, heart, watching, laugh, hooray, and thumbs up +1). We can typically do 8-10 items per month with all necessary regression testing, and we want you to help us decide which items will benefit you the most.
 
 ## License Summary