Update README with new contributor information

Added additional contributors to the README.

Author: fedorov

PW45_2026_Boston/Projects/RedesignedRestApiAndMcpServerForImagingDataCommons/README.md

@@ -17,6 +17,18 @@ key_investigators:
   affiliation: Institute for Systems Biology
   country: USA
 
+- name: Steve Pieper
+  affiliation: Isomics Inc.
+  country: USA
+
+- name: Ulrike Wagner
+  affiliation: Leidos Biomedical Research
+  country: USA
+
+- name: Granger Sutton
+  affiliation: National Cancer Institute
+  country: USA
+
 ---
 
 # Project Description