Update CITATION.cff

Added Negin, Philip and Nick's citation information

Author: hrhampapura

CITATION.cff

@@ -23,6 +23,13 @@ authors:
     given-names: Negin
     website: https://github.com/negin513
 
+  - family-names: Chmielowiec
+    given-names: Philip 
+    website: https://github.com/philip2c 
+
+  - family-names: Cote
+    given-names: Nicholas
+    website: https://github.com/ncote
   - name: "ARCO ERA-5 Cookbook contributors" # use the 'name' field to acknowledge organizations
     website: "https://github.com/ProjectPythia/ERA5_interactive-cookbook/graphs/contributors"
 title: "ARCO ERA-5 Interactive Visualization Cookbook"