fix zig version badge

Author: clickingbuttons

README.md

@@ -1,6 +1,6 @@
 # datetime
 
-![zig-version](https://img.shields.io/badge/dynamic/yaml?url=https%3A%2F%2Fraw.githubusercontent.com%2Fclickingbuttons%2Fdatetime%2Fmaster%2F.github%2Fworkflows%2Ftest.yml&query=%24.jobs.test.steps%5B1%5D.with.version&label=zig-version)
+![zig-version](https://img.shields.io/badge/dynamic/regex?url=https%3A%2F%2Fraw.githubusercontent.com%2Fclickingbuttons%2Fdatetime%2Frefs%2Fheads%2Fmaster%2Fbuild.zig.zon&search=minimum_zig_version%5Cs*%3D%5Cs*%22(.*)%22&replace=%241&label=minimum%20zig%20version)
 ![tests](https://github.com/clickingbuttons/datetime/actions/workflows/test.yml/badge.svg)
 [![docs](https://github.com/clickingbuttons/datetime/actions/workflows/publish_docs.yml/badge.svg)](https://clickingbuttons.github.io/datetime)