chore: Auto-update chart README [skip ci]

charts/incubator/mattermost/CHANGELOG.md

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+# Changelog<br>
+
+
+<a name="mattermost-0.0.1"></a>
+### mattermost-0.0.1 (2022-05-19)
+
+#### Feat
+
+* Add mattermost ([#2705](https://github.com/truecharts/apps/issues/2705))
+

charts/incubator/mattermost/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
-appVersion: "1.2.0"
+appVersion: "6.3"
 dependencies:
 - name: common
   repository: https://library-charts.truecharts.org

charts/incubator/mattermost/README.md

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+# Introduction
+
+Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.
+
+TrueCharts are designed to be installed as TrueNAS SCALE app only. We can not guarantee this charts works as a stand-alone helm installation.
+**This chart is not maintained by the upstream project and any issues with the chart should be raised [here](https://github.com/truecharts/apps/issues/new/choose)**
+
+## Source Code
+
+* <https://github.com/mattermost/mattermost-server>
+* <https://github.com/mattermost/docker>
+
+## Requirements
+
+Kubernetes: `>=1.16.0-0`
+
+## Dependencies
+
+| Repository | Name | Version |
+|------------|------|---------|
+| https://charts.truecharts.org/ | postgresql | 7.0.73 |
+| https://library-charts.truecharts.org | common | 9.3.15 |
+
+## Installing the Chart
+
+To install this App on TrueNAS SCALE check our [Quick-Start Guide](https://truecharts.org/manual/Quick-Start%20Guides/02-Installing-an-App/).
+
+## Upgrading, Rolling Back and Uninstalling the Chart
+
+To upgrade, rollback or delete this App from TrueNAS SCALE check our [Quick-Start Guide](https://truecharts.org/manual/Quick-Start%20Guides/04-Upgrade-rollback-delete-an-App/).
+
+## Support
+
+- Please check our [quick-start guides](https://truecharts.org/manual/Quick-Start%20Guides/01-Adding-TrueCharts/) first.
+- See the [Wiki](https://truecharts.org)
+- Check our [Discord](https://discord.gg/tVsPTHWTtr)
+- Open a [issue](https://github.com/truecharts/apps/issues/new/choose)
+---
+All Rights Reserved - The TrueCharts Project