Propose Upgrading to Mattermost v10.11.2 Extended Support Release

@denisra @mbruemmer I'm opening an issue to give your team a heads up that we have released an v10.11.2 Extended Support Release.

Release notes can be found here: https://docs.mattermost.com/product-overview/mattermost-v10-changelog.html#release-v10-11-extended-support-release.

SHA-256 Hash for v10.11.2: 912fe7851c676c52e2b62088184e882d85cf6e1efb059cdf1077ef06f95d8922