chore: add correct variable

Signed-off-by: Shabareesh Shetty <[email protected]>

Author: ShabiShett07

lib/node_modules/@stdlib/blas/base/dtrmv/examples/c/example.c

@@ -28,7 +28,7 @@ int main( void ) {
 		3.0, 2.0, 1.0
 	};
 	// Define `x` vector:
-	double X[ 3 ] = { 1.0, 2.0, 3.0 };
+	double x[ 3 ] = { 1.0, 2.0, 3.0 };
 
 	// Specify the number of elements along each dimension of `A`:
 	const int N = 3;