feat: add new chat service based on matrix oniro links

Related to eclipsefdn/it/websites/oniroproject.org#27



Signed-off-by: sebastien.heurtematte <sebastien.heurtematte@eclipse-foundation.org>

config.toml

@@ -75,5 +75,5 @@ pluralizeListTitles = false
 
 [[menu.main]]
     name = "Talk To Us"
-    url = "https://web.libera.chat/#oniroproject"
+    url = "https://chat.eclipse.org/#/room/#oniro:matrix.eclipse.org"
     weight = 5
\ No newline at end of file

content/resource-center/index.md

@@ -11,7 +11,7 @@ The Oniro project will benefit from a substantial initial contribution resulting
 You can access these resources now, currently hosted at Eclipse:
 * [Get the Code](https://gitlab.eclipse.org/eclipse/oniro-core)
 * [Documentation](http://docs.oniroproject.org)
-* [Talk to us](https://docs.oniroproject.org/en/latest/community-chat-platform.html) at [Libera chat](https://web.libera.chat/#oniroproject) - channel #oniroproject
+* [Talk to us](https://docs.oniroproject.org/en/latest/community-chat-platform.html) at [Eclipse Foundation Chat Service](https://chat.eclipse.org/#/room/#oniro:matrix.eclipse.org) - space #oniro:matrix.eclipse.org
 
 To learn more about the Oniro project at the Eclipse Foundation, check out the:
 * [Oniro Top Level Project](https://projects.eclipse.org/projects/oniro)