upd slack address (#195)

Author: gertd

docs/command-line-interface/ds-load-cli/plugins/custom.mdx

@@ -45,6 +45,6 @@ Arguments:
 
 ## Need help?
 
-Please drop us a line in our [community slack](https://aserto.com/slack) if you need help writing a custom plugin!  Also, we're happy to evaluate and accept new providers written by the community via a Pull Request in the [ds-load](https://github.com/aserto-dev/ds-load) repository.
+Please drop us a line in our [community slack](https://topaz-authz.slack.com) if you need help writing a custom plugin!  Also, we're happy to evaluate and accept new providers written by the community via a Pull Request in the [ds-load](https://github.com/aserto-dev/ds-load) repository.
 
 Submitted plugins should follow the same design patterns as existing providers, and live in the [plugins](https://github.com/aserto-dev/ds-load/tree/main/plugins) directory.

docusaurus.config.js

@@ -101,7 +101,7 @@ const config = {
           {
             html: '<img height="18" src="/img/slack-logo.svg" alt="community slack" />',
             position: 'right',
-            href: 'https://aserto.com/slack'
+            href: 'https://topaz-authz.slack.com'
           },
           {
             html: '<img width="150px" src="https://img.shields.io/github/stars/aserto-dev/topaz?style=for-the-badge&logo=github&logoColor=%23e7e7e7&logoSize=auto&label=Topaz&labelColor=rgb(36%2C37%2C38)&color=rgb(100%2C100%2C100)&link=https%3A%2F%2Fgithub.com%2Faserto-dev%2Ftopaz" alt="github topaz" />',