[slack] Add docs link in gethue.com Slack section
<h2>Install the Slack App!</h2>
<p class="lead">
Assist users with their SQL queries and leverage different
- <a href="/blog/2021-04-09-collaborate-on-your-sql-queries-and-results-directly-within-slack/">features</a>
+ <a href="{{ .Site.Params.docsHost }}/user/concept/#slack">features</a>
such as rich preview for links, sharing from Editor etc. directly in Slack.
<br /> Give your Hue hostname below and
- <a href="/blog/2021-05-18-installing-hue-slack-app-in-three-simple-steps/">install</a>
+ <a href="{{ .Site.Params.docsHost }}/administrator/configuration/server/#manual-slack-app-installation">install</a>
it in your workspace within seconds...
</p>
<form autocomplete="off" onsubmit="return check(event)">
