Use bash.

hunghaoti · hunghaoti · commit 433c3334906d · 2025-11-20T00:57:22.000+08:00
diff --git a/docs/api_doc_script.sh b/docs/api_doc_script.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 doxygen_build()
 {
 	VTAG=$1
