Update French localization for repository maintainers

Changed the value of the `repository_maintainers` key
from "mainteneurs_du_dépôt" to "responsables_du_dépôt"
in the French localization resource file.

Author: Calin Lupas

src/DevExcelerateApi/Resources/Services.LocalizationService.fr.resx

@@ -268,7 +268,7 @@
     <value>description_du_dépôt</value>
   </data>
   <data name="repository_maintainers" xml:space="preserve">
-    <value>mainteneurs_du_dépôt</value>
+    <value>responsables_du_dépôt</value>
   </data>
   <data name="repository_readers" xml:space="preserve">
     <value>lecteurs_du_dépôt</value>