docs: fix interpolation string

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/math/base/special/factorial2f/examples/c/example.c

@@ -26,6 +26,6 @@ int main( void ) {
 	int i;
 	for ( i = 0; i < 5; i++ ) {
 		b = stdlib_base_factorial2f( x[ i ] );
-		printf ( "factorial2f(%lf) = %f\n", x[ i ], b );
+		printf ( "factorial2f(%f) = %f\n", x[ i ], b );
 	}
 }