added birdsopen source homepage link to top right corner

Author: balotofi

_config.yml

@@ -71,6 +71,8 @@ heading_anchors: true
 aux_links:
   "Go to GitHub":
     - "https://github.com/BIRDSOpenSource"
+  "BIRDSOpenSource Homepage":
+    - "https://birds-project.com/open-source/"
 
 # Makes Aux links open in a new tab. Default is false
 aux_links_new_tab: true