Fix mkdocs build

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

mkdocs.yml

@@ -1,11 +1,10 @@
 site_name: Mobilizon
-repo_name: 'framasoft/mobilizon'
-repo_url: 'https://framagit.org/framasoft/mobilizon'
+repo_name: "framasoft/mobilizon"
+repo_url: "https://framagit.org/framasoft/mobilizon"
 extra:
-  repo_icon: gitlab
   social:
-    - type: 'twitter'
-      link: 'https://twitter.com/joinmobilizon'
+    - icon: "fontawesome/brands/twitter"
+      link: "https://twitter.com/joinmobilizon"
 markdown_extensions:
   - admonition
   - codehilite
@@ -16,6 +15,7 @@ markdown_extensions:
   - pymdownx.superfences
   - pymdownx.magiclink
   - pymdownx.smartsymbols
+  - pymdownx.tabbed
   - pymdownx.tilde
   - pymdownx.mark
 plugins:
@@ -24,14 +24,16 @@ plugins:
   - minify:
       minify_html: true
 theme:
-  name: 'material'
-  custom_dir: 'docs/theme/'
+  name: "material"
+  features:
+    - instant
+    - tabs
+  custom_dir: "docs/theme/"
   palette:
-    primary: 'yellow'
-    accent: 'deep purple'
+    primary: "amber"
+    accent: "deep purple"
+    scheme: slate
   font: false
-  #logo: 'logo.png'
-  logo:
-    icon: 'calendar_today'
-  feature:
-    tabs: true
+  icon:
+    logo: material/calendar
+    repo: fontawesome/brands/gitlab