chore: update version to 3.8.3

Relates to #615

Author: YDX-2147483647

bithesis.dtx

@@ -21,10 +21,10 @@
 %<thesis>\ProvidesExplClass{bithesis}
 %<report>\ProvidesExplClass{bitreport}
 %<beamer>\ProvidesExplClass{bitbeamer}
-%<cls>{2025-03-25}{3.8.2}{BIT Thesis Templates}
+%<cls>{2025-04-08}{3.8.3}{BIT Thesis Templates}
 %
 %<*driver>
-\ProvidesFile{bithesis.dtx}[2025/03/25 3.8.2 BIT Thesis Templates]
+\ProvidesFile{bithesis.dtx}[2025/04/08 3.8.3 BIT Thesis Templates]
 \documentclass[letterpaper]{l3doc}
 \usepackage{dtx-style}