ci: Reduce blank lines

.github/workflows/discord-release-notification.yml

@@ -33,8 +33,9 @@ jobs:
             sed 's/`//g' | 
             sed -E 's/^[0-9]+\.[0-9]+\.[0-9]+ \([0-9]{4}-[0-9]{2}-[0-9]{2}\)//g' | 
             sed '/^$/N;/^\n$/D' |
-            sed -E 's/^(Bug Fixes|Features|BREAKING CHANGES)/\n**\1**\n/g' |
-            sed -E 's/^([A-Z][a-z]+ [A-Z][a-z]+)/\n**\1**\n/g' |
+            sed -E 's/^(Bug Fixes|Features|BREAKING CHANGES)/\n**\1**/g' |
+            sed -E 's/^([A-Z][a-z]+ [A-Z][a-z]+)/\n**\1**/g' |
+            sed ':a;N;$!ba;s/\n{3,}/\\n\\n/g' |  # Replace multiple newlines with two
             sed ':a;N;$!ba;s/\n/\\n/g')
           echo "Sending notification for release: $RELEASE_TAG"
           curl -H "Content-Type: application/json" -X POST -d @- $DISCORD_WEBHOOK <<EOF