Remove mkdocs.yml deprecations and new docer with python 3.8.2

.circleci/config.yml

@@ -3,7 +3,7 @@ version: 2.0
 jobs:
   "Test":
     docker:
-      - image: fastlanetools/ci:0.3.0
+      - image: fastlanetools/ci:0.4.0
     working_directory: ~/code
     steps:
       - checkout
@@ -16,7 +16,7 @@ jobs:
       - run: bundle exec danger || echo "danger failed, moving on"
   "Deploy":
     docker:
-      - image: fastlanetools/ci:0.3.0
+      - image: fastlanetools/ci:0.4.0
     working_directory: ~/code
     steps:
       - checkout

mkdocs.yml

@@ -5,7 +5,7 @@ copyright: Copyright &copy; 2021 <a href="https://fastlane.tools">fastlane</a>
 site_author: fastlane team
 site_description: Documentation for fastlane tools, the easiest way to automate building
   and releasing your iOS and Android apps
-site_favicon: img/favicon.ico
+#site_favicon: img/favicon.ico
 repo_url: https://github.com/fastlane/docs
 google_analytics:
 - UA-18658848-13
@@ -24,7 +24,7 @@ extra_css: [./css/sidenav.css,./css/fastlane.css,./css/code.css,./css/breadcrmbs
 theme:
     name: readthedocs
     custom_dir: theme
-pages:
+nav:
 - Home: index.md
 - Getting Started:
   - iOS: