chore: fix C lint errors (issue #6994)

Author: zhanggy

lib/node_modules/@stdlib/stats/base/dmeanstdevpn/examples/c/example.c

@@ -22,7 +22,7 @@
 
 int main( void ) {
 	// Create a strided array:
-	double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };
+	const double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };
 
 	// Create an output array:
 	double out[] = { 0.0, 0.0 };