Add comment for cli example reference

src/main.zig

@@ -15,6 +15,9 @@ pub fn main() !void {
 
     const gpa = if (is_debug) dba.allocator() else std.heap.smp_allocator;
 
+    // CLI parsing adapted from the example here
+    // https://github.com/Hejsil/zig-clap/blob/e47028deaefc2fb396d3d9e9f7bd776ae0b2a43a/README.md#examples
+
     // First we specify what parameters our program can take.
     // We can use `parseParamsComptime` to parse a string into an array of `Param(Help)`.
     const params = comptime clap.parseParamsComptime(