Fix readme instruction

Author: tanche

readme.md

@@ -7,14 +7,14 @@ Using zig build system to build [CppUTest](https://github.com/cpputest/cpputest)
 First update your *build.zig.zon* with:
 
 ```bash
-zig fetch --save git+https://github.com/lcp5y3/cpputest-zig.git#v4.0.0
+zig fetch --save git+https://github.com/lcp5y3/cpputest-zig.git#b409129f4472213c222ce861e4f891fefa4d1c5e
 ```
 
 After that you can link `CppUTest` with your project by adding the following
 lines to your `build.zig`
 
 ```zig
-const cpputest_dep = b.dependency("cpputest_zig", .{
+const cpputest_dep = b.dependency("cpputest", .{
   .target = target,
   .optimize = optimize,
 });