Updated authors

CREDITS

@@ -1,5 +1,6 @@
 # Copyright (C) 2015-2025: The University of Edinburgh, United Kingdom
-#                 Authors: Craig Warren, Antonis Giannopoulos, and John Hartley
+#                 Authors: Craig Warren, Antonis Giannopoulos, John Hartley,
+#                          and Nathan Mannall
 #
 # This is the official list of entities and people who have contributed to gprMax
 #
@@ -15,6 +16,5 @@ gprMax is a contribution to COST Action TU1208 'Civil Engineering Applications o
 As well as the aforementioned authors, the following individuals have contributed to gprMax:
 
 Oystein Bjorndal
-John Hartley
 Rajath Kumar
 Tobias Schruff