Add Sandia RSE group

Author: cosden

_data/rse-groups.yml

@@ -97,4 +97,7 @@
 - institution: University of Florida
   name: UFIT Research Computing
   url: https://www.rc.ufl.edu
+- insitution: Sandia National Laboratories
+  name: Software Engineering and Research Department
+  url: https://www.sandia.gov/ccr/department/software-engineering-research/