Update NEWS and THANKS.in for Andreas Hasenkopf's contribution

NEWS

@@ -7,6 +7,7 @@ This file documents the major additions and syntax changes between releases.
 	check_ssh: Fixed issue where the remote-protocol flag was not functioning correctly (Sandor Gardil)
 	configure.ac: update egrep -> grep -E (Michael Orlitzky)
 	check_procs: Some stylistic fixes to --exclude-process (#726) (Edgar Fuß)
+	check_icmp: Fixed issue where the "No hosts to check" message was not returned for IPv6 address :: (Andreas Hasenkopf)
 
 2.4.12 2024-08-20
 	FIXES

THANKS.in

@@ -19,6 +19,7 @@ Alwyn Cherrington
 Anders Kaseorg
 Andreas Behal
 Andreas Ericsson
+Andreas Hasenkopf
 Andreas Seemueller
 Andrew Berglund
 Andrew Elwell