pnmixer-gtk3: harden aur_pre_build (#2228)

Author: SilverRainZ

archlinuxcn/pnmixer-gtk3/lilac.yaml

@@ -1,12 +1,10 @@
-# This file is auto-generated by n2y
-
 maintainers:
   - github: SilverRainZ
     email: Shengyu Zhang <la@archlinuxcn.org>
 
 build_prefix: extra-x86_64
 
-pre_build: aur_pre_build
+pre_build_script: aur_pre_build(maintainers=['SilverRainZ'])
 
 post_build: aur_post_build