add a note about not notifying

Author: shawnbot

script/release-pr

@@ -2,6 +2,8 @@
 set -e
 echo "🐦  Publishing PR (canary) release..."
 
+# don't notify of a pending publish event because the version will differ from
+# what lerna creates as a canary release
 # $(dirname $0)/notify pending
 
 $(npm bin)/lerna publish --npm-tag=pr --canary --exact $@