chore(triagebot): enable review-changes-since

Adds at the end of a review body a link
to view the changes that happened since the review
Documentation at: https://forge.rust-lang.org/triagebot/review-changes-since.html

Author: weihanglo

triagebot.toml

@@ -42,6 +42,11 @@ label = "O-windows"
 # Documentation at: https://forge.rust-lang.org/triagebot/range-diff.html
 [range-diff]
 
+# Adds at the end of a review body a link to view the changes that happened
+# since the review
+# Documentation at: https://forge.rust-lang.org/triagebot/review-changes-since.html
+[review-changes-since]
+
 [merge-conflicts]
 remove = []
 add = ["S-waiting-on-author"]