Update icebox message

Summary:
Tweaking icebox message to match our automated script.
Closes https://github.com/facebook/react-native/pull/15640

Differential Revision: D5700487

Pulled By: hramos

fbshipit-source-id: 5e46d540591a664e303cb301f09a850db785c710

bots/IssueCommands.txt

@@ -64,6 +64,6 @@ close
 comment Hey {issue_author}! Thanks for sending this pull request! We would love to review your changes however it looks like you haven't signed the CLA yet. You can do so at https://code.facebook.com/cla. See ["How to Contribute"](https://facebook.github.io/react-native/docs/contributing.html#pull-requests) to learn more.
 
 @facebook-github-bot icebox
-comment {author} tells me to close this issue because it has been inactive for a while. It's possible that the bug has been fixed since this issue was originally submitted, or perhaps it is not affecting a great amount of people, or a workaround has been provided. Either way, we're going to close this in order to allow the community to focus on more pressing issues. If you strongly believe this issue should remain open, please let us know why. See ["What to Expect from Maintainers"](https://facebook.github.io/react-native/docs/maintainers.html#handling-issues) to learn more.
+comment {author} tells me to close this issue because it has been inactive for a while. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. Either way, we're automatically closing issues after a period of inactivity. Please do not take it personally!<br/><br/>If you think this issue should definitely remain open, please let us know. The following information is helpful when it comes to determining if the issue should be re-opened:<br/><br/>- Does the issue still reproduce on the latest release candidate? Post a comment with the version you tested.<br/>- If so, is there any information missing from the bug report? Post a comment with all the information required by the [issue template](https://github.com/facebook/react-native/blob/master/.github/ISSUE_TEMPLATE.md).<br/>- Is there a pull request that addresses this issue? Post a comment with the PR number so we can follow up.<br/><br/>If you would like to work on a patch to fix the issue, *contributions are very welcome*! Read through the [contribution guide](http://facebook.github.io/react-native/docs/contributing.html), and feel free to hop into [#react-native](https://discordapp.com/invite/0ZcbPKXt5bZjGY5n) if you need help planning your contribution.
 add-label Icebox
 close