Fix date in ipptool man page.

Author: michaelrsweet

man/ipptool.1

@@ -7,7 +7,7 @@
 .\" Licensed under Apache License v2.0.  See the file "LICENSE" for more
 .\" information.
 .\"
-.TH ipptool 1 "CUPS" "2025-04-30" "OpenPrinting"
+.TH ipptool 1 "CUPS" "2025-09-18" "OpenPrinting"
 .SH NAME
 ipptool \- perform internet printing protocol requests
 .SH SYNOPSIS