xz: Update man page timestamp.
diff --git a/src/xz/xz.1 b/src/xz/xz.1
index 47e6dd4..63087ca 100644
--- a/src/xz/xz.1
+++ b/src/xz/xz.1
@@ -5,7 +5,7 @@
 .\" This file has been put into the public domain.
 .\" You can do whatever you want with this file.
 .\"
-.TH XZ 1 "2017-04-19" "Tukaani" "XZ Utils"
+.TH XZ 1 "2018-11-22" "Tukaani" "XZ Utils"
 .
 .SH NAME
 xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files