doc: add Adrien Cotte as co-maintainer of the project

Signed-off-by: Xavier Delaruelle <xavier.delaruelle@cea.fr>

Author: xdelaruelle

.hunspell.en.dic

@@ -1326,3 +1326,5 @@ gid
 cmp
 Achim
 Gsell
+adrien
+cotte

GOVERNANCE.rst

@@ -25,11 +25,13 @@ Current Roster
 ~~~~~~~~~~~~~~
 
 * Xavier Delaruelle (`@xdelaruelle`_)
+* Adrien Cotte (`@adrien-cotte`_)
 
 .. note::
    Modules project is currently looking for additional Maintainers.
 
 .. _@xdelaruelle: https://github.com/xdelaruelle
+.. _@adrien-cotte: https://github.com/adrien-cotte
 
 Collaborators
 -------------

README.md

@@ -181,8 +181,10 @@ or (at your option) any later version (`GPL-2.0-or-later`). Read the file
 Authors
 -------
 
-Modules current core developer and maintainer is Xavier Delaruelle,
-xavier.delaruelle@cea.fr
+Modules current maintainers are:
+
+* Xavier Delaruelle, xavier.delaruelle@cea.fr
+* Adrien Cotte, adrien.cotte@asplus.fr
 
 Many thanks go to the [contributors][14] of the Modules project.