[No QA] Ping deployers when mobile prod deploys fail

[roryabraham]

Details

Ping mobile-deployers in #deployer when mobile prod deploys fail.

Fixed Issues

$ #4955

Tests

Not 100% sure how to test this. Maybe the following:

1. Merge this PR
2. Retry this production deploy
3. When iOS prod deploy fails, verify that we post in slack with the given message.

Two potential issues with this testing plan I see:

1. In step 2, I think it might use the previous version of the GH workflow code and not the code including this PR.
2. It doesn't test Android (although that might be fine)

QA Steps

None.

[roryabraham]

Updated to include link to stores

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[roryabraham]

This change did not take effect in the latest iOS prod deploy (which failed), so need to remember to re-check in the next failed mobile deploy.

[OSBotify]

🚀 Deployed to staging by @AndrewGable in version: 1.0.91-1 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production by @roryabraham in version: 1.0.92-0 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅