Update LICENSE user_config template

user_config/LICENSE

+<!-- BEGIN MKDOCS TEMPLATE -->
+<!--
+WARNING, DO NOT UPDATE CONTENT BETWEEN MKDOCS TEMPLATE TAG !
+Modified content will be overwritten when updating
+-->
 MIT License
 
-Copyright (c) 2020 Romain Deville <code@romaindeville.fr>
+Copyright (c) 2020 - 2021
+
+  - Emmanuel Coquery <emmanuel.coquery@univ-lyon1.fr>
+  - Eric Boix <eric.boix@liris.cnrs.fr>
+  - Romain Deville <code@romaindeville.fr>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -20,9 +29,4 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
-<!-- BEGIN MKDOCS TEMPLATE -->
-<!--
-WARNING, DO NOT UPDATE CONTENT BETWEEN MKDOCS TEMPLATE TAG !
-Modified content will be overwritten when updating
--->
 <!-- END MKDOCS TEMPLATE -->