Use "chat" instead of "slack"

composer.json

@@ -12,7 +12,7 @@
         "issues": "https://github.com/zendframework/zend-i18n/issues",
         "source": "https://github.com/zendframework/zend-i18n",
         "rss": "https://github.com/zendframework/zend-i18n/releases.atom",
-        "slack": "https://zendframework-slack.herokuapp.com",
+        "chat": "https://zendframework-slack.herokuapp.com",
         "forum": "https://discourse.zendframework.com/c/questions/components"
     },
     "require": {

docs/CONTRIBUTING.md

@@ -7,7 +7,7 @@ read/subscribe to the following resources:
 
  - [Coding Standards](https://github.com/zendframework/zend-coding-standard)
  - [Forums](https://discourse.zendframework.com/c/contributors)
- - [Slack](https://zendframework-slack.herokuapp.com)
+ - [Chat](https://zendframework-slack.herokuapp.com)
  - [Code of Conduct](CODE_OF_CONDUCT.md)
 
 If you are working on new features or refactoring

docs/ISSUE_TEMPLATE.md

@@ -1,5 +1,5 @@
  - [ ] I was not able to find an [open](https://github.com/zendframework/zend-i18n/issues?q=is%3Aopen) or [closed](https://github.com/zendframework/zend-i18n/issues?q=is%3Aclosed) issue matching what I'm seeing.
- - [ ] This is not a question. (Questions should be asked on [slack](https://zendframework.slack.com/) ([Signup for Slack here](https://zendframework-slack.herokuapp.com/)) or our [forums](https://discourse.zendframework.com/).)
+ - [ ] This is not a question. (Questions should be asked on [chat](https://zendframework.slack.com/) ([Signup here](https://zendframework-slack.herokuapp.com/)) or our [forums](https://discourse.zendframework.com/).)
 
 Provide a narrative description of what you are trying to accomplish.
 

docs/SUPPORT.md

@@ -3,13 +3,13 @@
 Zend Framework offers three support channels:
 
 - For real-time questions, use our
-  [Slack](https://zendframework-slack.herokuapp.com)
+  [chat](https://zendframework-slack.herokuapp.com)
 - For detailed questions (e.g., those requiring examples) use our
   [forums](https://discourse.zendframework.com/c/questions/components)
 - To report issues, use this repository's
   [issue tracker](https://github.com/zendframework/zend-i18n/issues/new)
 
-**DO NOT** use the issue tracker to ask questions; use Slack or the forums for
+**DO NOT** use the issue tracker to ask questions; use chat or the forums for
 that. Questions posed to the issue tracker will be closed.
 
 When reporting an issue, please include the following details: