refactor: align ndarray/iter/rows with namespace error-construction conventions

Wrapped the dim-check `TypeError` in `format(...)` to match the dominant
error-construction pattern in the file (other throws already use
`format()`, including a static-string `Error` on line 113) and across
the `ndarray/iter` namespace, where sibling packages with analogous
dim-checks (`subarrays`, `stacks`, `interleave-subarrays`) wrap the
throw in `format()`. Message text is preserved exactly.

Author: claude

lib/node_modules/@stdlib/ndarray/iter/rows/lib/main.js

@@ -120,7 +120,7 @@ function nditerRows( x ) {
 
 	// Ensure that the input array has sufficient dimensions...
 	if ( ndims < 2 ) {
-		throw new TypeError( 'invalid argument. First argument must be an ndarray having at least two dimensions.' );
+		throw new TypeError( format( 'invalid argument. First argument must be an ndarray having at least two dimensions.' ) );
 	}
 	// Check whether the input array is empty...
 	N = numel( shape );