[monitoring-plugins] Update copyright

[RincewindsHat]

 Module: monitoring-plugins
 Branch: master
 Commit: 9f9f5fd9b22e6e6d6415be3c3ecde9f795b55fe2
 Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
   Date: Sun Oct  1 14:05:59 2023 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=9f9f5fd

Update copyright

---

 plugins-root/check_dhcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c
index 4d16772..0ddace5 100644
--- a/plugins-root/check_dhcp.c
+++ b/plugins-root/check_dhcp.c
@@ -34,7 +34,7 @@
  *****************************************************************************/
 
 const char *progname = "check_dhcp";
-const char *copyright = "2001-2007";
+const char *copyright = "2001-2023";
 const char *email = "devel at monitoring-plugins.org";
 
 #include "common.h"