Update mkdocs.yml, add Hindi (हिन्दी), ISO 639-1 Code: hi

close #77

Author: SergeCroise

mkdocs.yml

@@ -93,6 +93,10 @@ plugins:
           default: false
           locale: es
           name: Español
+        - build: true
+          default: false
+          locale: hi
+          name: हिन्दी
         - build: true
           default: false
           locale: id