Don't include timestamp in generated manpages

[guilherme-puida]

This makes manpage generation reproducible. I found this problem using Debian's reproducible builds infrastructure.

--- old/dasel.1	2024-05-02 15:59:19.342436672 -0300
+++ new/dasel.1	2024-05-02 15:52:35.300986397 -0300
@@ -1,5 +1,5 @@
 .nh
-.TH "DASEL" "1" "May 2024" "Auto generated by spf13/cobra" ""
+.TH "DASEL" "1" "May 2024" "" ""
 
 .SH NAME
 .PP
@@ -73,8 +73,3 @@
 .SH SEE ALSO
 .PP
 \fBdasel-completion(1)\fP, \fBdasel-delete(1)\fP, \fBdasel-man(1)\fP, \fBdasel-put(1)\fP, \fBdasel-validate(1)\fP
-
-
-.SH HISTORY
-.PP
-2-May-2024 Auto generated by spf13/cobra

[TomWright]

Thanks for the contribution @guilherme-puida