Update rse-gln.md (#1688)

Update to RSE-GLN Coordinator contact, Daniel Madren

Author: DMadren

pages/ag/rse-gln.md

@@ -57,7 +57,7 @@ Both groups have Slack channels in the US-RSE space for collaboration.
 # Questions?
 
 Reach out to RSE-GLN coordinators
-[Christina Maimone](mailto:christina.maimone@northwestern.edu) and
+[Daniel Madren](mailto:dmadren@purdue.edu) and
 [Adam Rubens](mailto: [email protected]) with questions.