fix sodar references in app_projectroles_usage (#1389)

docs/source/app_projectroles_usage.rst

@@ -37,7 +37,7 @@ provider.
     :align: center
     :scale: 75%
 
-    SODAR login form
+    SODAR Core login form
 
 
 User Interface
@@ -374,7 +374,8 @@ project data can be provided. A target site can define exactly one source site,
 from which project data can be retrieved from.
 
 To enable remote project data and member synchronization, you must first set up
-either a target or a source site depending on the role of your own SODAR site.
+either a target or a source site depending on the role of your own SODAR Core
+based site.
 
 .. figure:: _static/app_projectroles/sodar_remote_sites.png
     :align: center
@@ -502,7 +503,7 @@ Alternatively, the following management command can be used:
     If a local user is the owner of a synchronized project on the source site,
     the user defined in the ``PROJECTROLES_DEFAULT_ADMIN`` will be given the
     owner role. Hence you **must** have this setting defined if you are
-    implementing a SODAR site in target mode.
+    implementing a SODAR Core based site in target mode.
 
 .. note::