[workers] Clarify compatibility_date in wrangler.toml

[vicb]

Summary

Clarify what happens when compatibility_date is not specified in wrangler.toml

Documentation checklist

• The documentation style guide has been adhered to.

[irvinebroque]

npx wrangler deploy

✘ [ERROR] A compatibility_date is required when publishing. Add the following to your wrangler.toml file:.

      ```
      compatibility_date = "2024-08-28"
      ```

?

[vicb]

Oh!

Let me double check then. At least this is inconsistent with dev:

▲ [WARNING] No compatibility_date was specified. Using the installed Workers runtime's latest supported date: 2024-08-21.

  ❯❯ Add one to your wrangler.toml file: compatibility_date = "2024-08-21", or
  ❯❯ Pass it in your terminal: wrangler dev [<SCRIPT>] --compatibility-date=2024-08-21
  
  See https://developers.cloudflare.com/workers/platform/compatibility-dates/ for more information.

[vicb]

@irvinebroque I'm going to close this.

What are your thinking about the misalignment of dev vs prod here?
Looks like the behavior has been consistent since it was implemented.
However I can not think of any benefit of having different behaviors in dev vs deploy.