message: ci: Fix canary dist-tag for prerelease canaries in slack message
diff: @@ -101,7 +101,7 @@ exec('git diff --name-only HEAD HEAD^')
  author_name: `New canary build published (v${data.version})`,
  title: `Merge commit ${data.sha}`,
  title_link: `https://github.com/Workday/canvas-kit/commit/${data.sha}`,
  - text: `\`yarn add @workday/canvas-kit-{module}@${data.version}\`\nor\n\`yarn add @workday/canvas-kit-{module}@next\`\n`,
  + text: `\`yarn add @workday/canvas-kit-{module}@${data.version}\`\nor\n\`yarn add @workday/canvas-kit-{module}@${distTag}\`\n`,
  });
  })
  .catch(err => {
  