update mkdocs

Author: MilagrosMarin

mkdocs.yaml

@@ -109,6 +109,9 @@ extra:
     - icon: main/company-logo
       link: https://www.datajoint.com
       name: DataJoint
+    - icon: main/company-logo
+      link: https://datajoint.com/docs/
+      name: DataJoint Documentation      
     - icon: fontawesome/brands/slack
       link: https://datajoint.slack.com
       name: Slack
@@ -127,11 +130,8 @@ extra:
     - icon: fontawesome/brands/python
       link: https://pypi.org/user/datajointbot
       name: PyPI
-TODO:    - icon: fontawesome/brands/stack-overflow
-      link: https://stackoverflow.com/questions/tagged/datajoint
-      name: StackOverflow
     - icon: fontawesome/brands/youtube
-      link: https://www.youtube.com/channel/UCdeCuFOTCXlVMRzh6Wk-lGg
+      link: https://www.youtube.com/@datajoint
       name: YouTube
 extra_css:
   - assets/stylesheets/extra.css