Update links to use GitHub Pages URLs

Author: hohwille

website/pages/welcome/welcome.asciidoc

@@ -15,13 +15,13 @@ We are devonfw - a software development platform. +
 We provide You with Tools, Architecture, Methodology, Components and Knowledge.
 
 [.btn.blue-button]
-https://devonfw.com/website/pages/docs/devonfw-guide_getting-started.wiki_getting-started.asciidoc.html[GET STARTED]
+https://devonfw.github.io/website/pages/docs/devonfw-guide_getting-started.wiki_getting-started.asciidoc.html[GET STARTED]
 
 [.btn.white-button.overlay-trigger]
-https://devonfw.com/website/pages/docs/devonfw-guide_ide.wiki_setup.asciidoc.html[DOWNLOAD]
+https://devonfw.github.io/website/pages/docs/devonfw-guide_ide.wiki_setup.asciidoc.html[DOWNLOAD]
 
 [.btn.white-button]
-https://github.com/devonfw/dashboard/releases/download/v1.0.0-beta.1/devonfw-dashboard.v1.0.0-beta.1.exe[DOWNLOAD DASHBOARD (beta)]
+https://devonfw.github.io/devonfw/dashboard/releases/download/v1.0.0-beta.1/devonfw-dashboard.v1.0.0-beta.1.exe[DOWNLOAD DASHBOARD (beta)]
 
 --