message: Fix link to environments.md in CHANGELOG file
  [`/cloudflare/wrangler/blob/master/docs/environments.md`](`https://github.com/cloudflare/wrangler/blob/master/docs/environments.md`) -> [`/cloudflare/wrangler/blob/master/docs/content/environments.md`](`https://github.com/cloudflare/wrangler/blob/master/docs/content/environments.md`)
diff: With multiple environments defined, `wrangler build`, `wrangler preview`, and `wrangler publish` now accept a `--env` flag to indicate what environment you'd like to use, for instance, `wrangler publish --env production`.
  - To support developers transitioning to environments, we've written documentation for the feature, including further information about deprecations and advanced usage. [Check out the documentation here!](https://github.com/cloudflare/wrangler/blob/master/docs/environments.md)
  + To support developers transitioning to environments, we've written documentation for the feature, including further information about deprecations and advanced usage. [Check out the documentation here!](https://github.com/cloudflare/wrangler/blob/master/docs/content/environments.md)
  [EverlastingBugstopper]: https://github.com/EverlastingBugstopper
  [issue/385]: https://github.com/cloudflare/wrangler/issues/385
  