Add a link to storybook (#4996)

* Add a link to storybook

* Swap single quote for backtick

Author: iamwillpowell

.circleci/comment.js

@@ -56,7 +56,8 @@ async function run() {
       [NextJS App Size](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/verdaccio/publish-stats/next-build-stats.txt)
       [Publish stats](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/verdaccio/publish-stats/publish.json)
       [Size diff since last release](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/verdaccio/publish-stats/size-diff.txt)
-      [Docs](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/verdaccio/docs/index.html)`
+      [Docs](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/verdaccio/docs/index.html)
+      [Storybook](https://reactspectrum.blob.core.windows.net/reactspectrum/${process.env.CIRCLE_SHA1}/storybook/index.html)`
         });
       }
     } catch (error) {