fixed a typo in a comment

Author: davidnich

src/QorePythonProgram.cpp

@@ -5,7 +5,7 @@
 
     Qore Programming Language
 
-    Copyright 2020 - 2921 Qore Technologies, s.r.o.
+    Copyright 2020 - 2021 Qore Technologies, s.r.o.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public