Update domain to github pages

Author: hohwille

website/index.html

@@ -10,13 +10,13 @@
 
     <meta name="title" property="og:title" content="devonfw website">
     <meta property="og:type" content="website">
-    <meta name="image" property="og:image" content="https://devonfw.com/images/devonfwwebsite.png">
+    <meta name="image" property="og:image" content="https://devonfw.github.io/images/devonfwwebsite.png">
     <meta name="description" property="og:description" content="devonfw is the standard open source software development platform; Serving the full Software Delivery Life Cycle.">
-    <meta property="og:url" content="https://devonfw.com/index.html">
+    <meta property="og:url" content="https://devonfw.github.io/index.html">
 
     <meta name="twitter:title" content="devonfw website">
     <meta name="twitter:description" content="devonfw is the standard open source software development platform; Serving the full Software Delivery Life Cycle.">
-    <meta name="twitter:image" content="https://devonfw.com/images/devonfwwebsite.png">
+    <meta name="twitter:image" content="https://devonfw.github.io/images/devonfwwebsite.png">
     <meta name="twitter:card" content="summary_large_image">
 
     <!-- ************************************* -->