Insert current zig version for compatiblity!

This is primarily to make users aware that there has been a change in the call for individual exercises.

src/compat.zig

@@ -15,7 +15,7 @@ const print = if (@hasDecl(debug, "print")) debug.print else debug.warn;
 // When changing this version, be sure to also update README.md in two places:
 //     1) Getting Started
 //     2) Version Changes
-const needed_version_str = "0.11.0-dev.2157";
+const needed_version_str = "0.11.0-dev.2401";
 
 fn isCompatible() bool {
     if (!@hasDecl(builtin, "zig_version") or !@hasDecl(std, "SemanticVersion")) {