chore: adjust working group mentions (nodejs#5313)

Co-authored-by: Claudio Wunder <[email protected]>

Author: Trott

pages/en/get-involved/contribute.md

@@ -41,7 +41,7 @@ By becoming a collaborator, contributors can have even more impact on the projec
 * comments on issues and pull requests
 * contributions to the Node.js website
 * assistance provided to end users and novice contributors
-* participation in Working Groups
+* participation in working groups
 * other participation in the wider Node.js community
 
 If individuals making valuable contributions do not believe they have been considered for commit access, they may [log an issue](https://github.com/nodejs/TSC/issues) or [contact a TSC member](https://github.com/nodejs/node#tsc-technical-steering-committee) directly.

pages/en/get-involved/index.md

@@ -11,8 +11,8 @@ layout: contribute.hbs
 * For real-time chat about Node.js development use one of the platforms below
   * For IRC, go to `irc.libera.chat` in the `#node.js` channel with an [IRC client](https://en.wikipedia.org/wiki/Comparison_of_Internet_Relay_Chat_clients) or connect in your web browser to the channel using [a web client](https://kiwiirc.com/nextclient/)
   * For Slack, there are two options:
-    * [Node Slackers](https://www.nodeslackers.com/) is a Node.js-focused Slack community. Some Working Groups have discussion channels there.
-    * The [OpenJSF Slack](https://slack-invite.openjsf.org/) is a Foundation run Slack with several Node.js channels (channels prefixed by `#nodejs-` are related to the project). Some Working Groups have discussion channels there.
+    * The [OpenJSF Slack](https://slack-invite.openjsf.org/) is a Foundation run Slack with several Node.js channels (channels prefixed by `#nodejs-` are related to the project).
+    * [Node Slackers](https://www.nodeslackers.com/) is a Node.js-focused Slack community.
 * The official Node.js Twitter account is [nodejs](https://twitter.com/nodejs).
 * The [Node.js Foundation calendar](https://nodejs.org/calendar) with all public team meetings.