Update links to release mirror (re: #7822)

API.md

@@ -5,7 +5,7 @@ This file documents efforts toward establishing a public API for iD.
 ##### iD Standalone
 
 iD supports several URL parameters. When constructing a URL to a standalone instance
-of iD (e.g. `http://preview.ideditor.com/release/`), the following parameters are available
+of iD (e.g. `https://ideditor-release.netlify.app`), the following parameters are available
 **in the hash portion of the URL**:
 
 * __`background`__ - The value from a `sourcetag` property in iD's

CONTRIBUTING.md

@@ -203,7 +203,7 @@ You can use the [development preview site](https://ideditor.netlify.app) to test
 unreleased features and verify bug fixes, all without building iD yourself. This site
 is updated with the latest code and translations every time we change the `develop` branch.
 
-The deployments on https://openstreetmap.org and https://preview.ideditor.com/release
+The deployments on https://openstreetmap.org and https://ideditor-release.netlify.app
 are updated only with [stable releases](https://github.com/openstreetmap/iD/releases).
 Recently fixed issues may still be present on these sites until the next version of iD
 is released.

README.md

@@ -20,9 +20,9 @@
 if you're looking for something to do.
 * [Translate!](https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating)
 * Test a prerelease version of iD:
-  * Stable mirror of `release` branch:  https://preview.ideditor.com/release
+  * Stable mirror of `release` branch: https://ideditor-release.netlify.app
   * Development mirror of `develop` branch + latest translations: https://ideditor.netlify.com
-  * Development mirror of `v3-prototype` branch:  https://preview.ideditor.com/master
+  * Development mirror of `v3-prototype` branch: https://preview.ideditor.com/master
 
 Come on in, the water's lovely. More help? Ping `quincylvania` or `bhousel` on:
 * [OpenStreetMap US Slack](https://slack.openstreetmap.us/)