Merge remote-tracking branch 'origin/2.3-develop' into MC-20697

# Conflicts:
#	dev/tests/integration/testsuite/Magento/Catalog/Controller/Adminhtml/CategoryTest.php

Author: ysapiga

README.md

@@ -64,7 +64,7 @@ Please see LICENSE_EE.txt for the full text of the MEE License or visit https://
 
 ## Community Engineering Slack
 
-To connect with Magento and the Community, join us on the [Magento Community Engineering Slack](https://magentocommeng.slack.com). If you are interested in joining Slack, or a specific channel, send us a request at [engcom@adobe.com](mailto:engcom@adobe.com) or [self signup](https://tinyurl.com/engcom-slack).
+To connect with Magento and the Community, join us on the [Magento Community Engineering Slack](https://magentocommeng.slack.com). If you are interested in joining Slack, or a specific channel, send us a request at [engcom@adobe.com](mailto:engcom@adobe.com) or [self signup](https://opensource.magento.com/slack).
 
 
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