syntax in build.zig example doc

Author: thejoshwolfe

doc/langref.html.in

@@ -6067,7 +6067,7 @@ pub const TypeInfo = union(TypeId) {
       {#code_begin|syntax#}
 const Builder = @import("std").build.Builder;
 
-pub fn build(b: &Builder) void {
+pub fn build(b: *Builder) void {
     const exe = b.addExecutable("example", "example.zig");
     exe.setBuildMode(b.standardReleaseOptions());
     b.default_step.dependOn(&exe.step);