APPENG-985: Point documentation to our new support channel. (#45)

Following movement of support from #sre-guild to #appeng-pub we are renaming all occurrences and fixing slack links.

README.md

@@ -3,28 +3,28 @@
 ![Apache 2](https://img.shields.io/hexpm/l/plug.svg)
 ![Java 11](https://img.shields.io/badge/Java-11-blue.svg)
 ![Maven Central](https://badgen.net/maven/v/maven-central/com.transferwise.common/tw-graceful-shutdown)
-[![Owners](https://img.shields.io/badge/team-AppEng-blueviolet.svg?logo=wise)](https://transferwise.atlassian.net/wiki/spaces/EKB/pages/2520812116/Application+Engineering+Team) [![Slack](https://img.shields.io/badge/slack-sre--guild-blue.svg?logo=slack)](https://app.slack.com/client/T026FB76G/CLR1U8SNS)
+[![Owners](https://img.shields.io/badge/team-AppEng-blueviolet.svg?logo=wise)](https://transferwise.atlassian.net/wiki/spaces/EKB/pages/2520812116/Application+Engineering+Team) [![Slack](https://img.shields.io/badge/slack-appeng--pub-blue.svg?logo=slack)](https://wise.enterprise.slack.com/archives/C07QSPFLM5X)
 > Use the `@application-engineering-on-call` handle on Slack for help (this is only for Wisers).
 ---
 
 ## About
-This will keep your service running and kicking, until all the clients have understood that the node is going to shut down. 
+This will keep your service running and kicking, until all the clients have understood that the node is going to shut down.
 It will make sure that all on-flight requests will get served, all the jobs will gracefully shut down, all kafka listeners will stop and so on and on.
 
 The benefits are - fewer errors for clients, but also cleaner monitoring.
 
 ## 📚 Documentation
-Documentation can be found [here](docs/index.md). 
+Documentation can be found [here](docs/index.md).
 
 ## License
 Copyright 2021 TransferWise Ltd.
- 
+
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
- 
+
 http://www.apache.org/licenses/LICENSE-2.0
- 
+
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.