fix: improve slack message

Author: DaRaFF

lib/commands/create-downstream-release-branch.js

@@ -109,7 +109,7 @@ module.exports = function (dep) {
     if (argv.slackWebhookUrl) {
       await slackMessenger({
         webhookUrl: argv.slackWebhookUrl,
-        message: `${argv.repo} - ${argv.targetBranch} branch has been created sucessfully (https://github.com/${argv.owner}/${argv.repo}/tree/${argv.targetBranch}). A PR has been created at ${pullRequest.data.html_url}.`
+        message: `\`${argv.repo}\`: The downstream branch \`${argv.targetBranch}\` has been created sucessfully (https://github.com/${argv.owner}/${argv.repo}/tree/${argv.targetBranch}). A PR has been created at ${pullRequest.data.html_url}.`
       })
     }