update to new material format

en/mkdocs.yml

@@ -1,5 +1,5 @@
 site_name: Spearhead Cloud Documentation
-pages:
+nav:
   - Spearhead Cloud: index.md
   - Getting Started: start.md
   - Datacenters: datacenters.md
@@ -24,13 +24,13 @@ theme:
     primary: 'red'
     accent: 'red'
   logo: 'img/sphsp.png'
-  icon: 'cloud'
+  # icon: 'cloud'
   # favicon: 'img/favicon.ico'
 extra:
   social:
-    - type: 'github'
-      link: 'https://code.spearhead.cloud/Spearhead/'
-    - type: 'twitter'
+    - icon: fontawesome/brands/github-alt
+      link: 'https://github.com/spearheadsys/docs.spearhead.cloud'
+    - icon: fontawesome/brands/twitter
       link: 'https://twitter.com/spearhead_sys'
-    - type: 'linkedin'
+    - icon: fontawesome/brands/linkedin
       link: 'https://www.linkedin.com/company/spearhead-systems-srl/'