docs: fix C examples in blas/ext/base/dsumkbn

PR-URL: #4315
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/base/dsumkbn/README.md

@@ -241,7 +241,7 @@ int main( void ) {
     const double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };
 
     // Specify the number of elements:
-    const int N = 5;
+    const int N = 4;
 
     // Specify the stride length:
     const int strideX = 2;

lib/node_modules/@stdlib/blas/ext/base/dsumkbn/examples/c/example.c

@@ -24,7 +24,7 @@ int main( void ) {
 	const double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };
 
 	// Specify the number of elements:
-	const int N = 5;
+	const int N = 4;
 
 	// Specify the stride length:
 	const int strideX = 2;