ReleaseEngineering/How To/Update TryChooser

We need to keep the try syntax chooser webpage located here: https://build.mozilla.org/trychooser/ up to date so developers will continue to use it and we benefit from the lowered build/test load.

To keep the site up to date, check out the tools repo and update index.html with new test/talos suite names - be sure to change both the value and the label. Eg:

<li><label><input type="checkbox" name="talos_suite" value="'''paint'''">'''paint'''</label></li>

Once you've landed your patch to the webpages, log on to build.m.o and go to /var/www/html/trychooser/ and update the checkout of the tools repo that lives there. Your changes should now be live at https://build.mozilla.org/trychooser/