chore: update version to 3.8.1

Relates to #568

bithesis.dtx

@@ -1,7 +1,7 @@
 % \iffalse meta-comment
 %
-% Copyright (C) 2023
-% Association of Bit Network Pioneer and any individual authors listed elsewhere in this file.
+% Copyright (C) 2025
+% Net Pioneer Association of BIT and any individual authors listed elsewhere in this file.
 % -----------------------------------
 %
 % This work may be distributed and/or modified under the
@@ -21,10 +21,10 @@
 %<thesis>\ProvidesExplClass{bithesis}
 %<report>\ProvidesExplClass{bitreport}
 %<beamer>\ProvidesExplClass{bitbeamer}
-%<cls>{2024-10-07}{3.8.0}{BIT Thesis Templates}
+%<cls>{2025-01-03}{3.8.1}{BIT Thesis Templates}
 %
 %<*driver>
-\ProvidesFile{bithesis.dtx}[2024/10/07 3.8.0 BIT Thesis Templates]
+\ProvidesFile{bithesis.dtx}[2025/01/03 3.8.1 BIT Thesis Templates]
 \documentclass[letterpaper]{l3doc}
 \usepackage{dtx-style}