StringZilla: update to v3.12.3 (#6581)

packages/s/stringzilla/xmake.lua

@@ -9,6 +9,7 @@ package("stringzilla")
 
     add_configs("cpp", {description = "Enable C++ support.", default = true, type = "boolean"})
 
+    add_versions("v3.12.3", "94f10a6ee4f9231afe3dd314cb1cbe5901e9098c44ba538362c529d79ff01ce5")
     add_versions("v3.12.2", "a9d8518766a29b605bcd3a26c1d12e00d6fcddfc3541687d6adafd4aa7fe1c5f")
     add_versions("v3.12.1", "fcbd53fe4e827fa49eb1153f1116095a719a57fa6fb0a8680ba713088ad29d3e")
     add_versions("v3.11.3", "8ca47c1f1bb8ba67a89c54951fff08483087fa637a43941de1a44fb04a2ba83e")