clarify that pushing new code doesn't cause frontend to reload during development

[codekirei]

We've had some devs express confusion that when they're working on developing an app and have a browser window open to test things in the editor simultaneously, zapier push causes the frontend to get out of sync. In order to see the changes that were just pushed reflected in the frontend, you have to manually refresh the browser each time you push.

Once you understand this is how it works, the workflow isn't too bad — we just need to add some clarity to our docs to make it extra apparent that the browser refreshes are necessary.