Adds logo as a favicon

docs/images/book-information-variant.svg

+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M18 2h-6v7L9.5 7.5 7 9V2H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V4a2 2 0 00-2-2m-.32 16.41c-.11.09-1.21.84-1.63 1.09-.42.29-2.05 1.22-1.79-.58.63-3.64 1.85-5.8.39-4.86-.38.23-.6.37-.74.44-.13.11-.12.1-.23-.09s-.15-.18-.01-.28c0 0 2.23-1.79 3.05-1.85.78-.07.59.89.52 1.33-.46 1.85-1.3 4.54-1.17 4.93.11.39.93-.23 1.37-.54 0 0 .06-.07.17.05.11.17.22.25.07.36m-.71-7.35c-.57 0-1.03-.46-1.03-1.03 0-.57.46-1.03 1.03-1.03.57 0 1.03.46 1.03 1.03 0 .57-.46 1.03-1.03 1.03z"/></svg>

mkdocs.yml

@@ -13,6 +13,7 @@ theme:
   palette:
     primary: "pink"
     accent: "pink"
+  favicon: images/book-information-variant.svg
   icon:
     logo: material/book-information-variant
     repo: material/gitlab