bench: update failure messages

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: passed
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/snansum/benchmark/c/benchmark.length.c

@@ -143,13 +143,13 @@ static double benchmark( int iterations, int len ) {
 	for ( i = 0; i < iterations; i++ ) {
 		v = stdlib_blas_ext_snansum( arrays );
 		if ( v != v ) {
-			printf( "unexpected result\n" );
+			printf( "should not return NaN\n" );
 			break;
 		}
 	}
 	elapsed = tic() - t;
 	if ( v != v ) {
-		printf( "unexpected result\n" );
+		printf( "should not return NaN\n" );
 	}
 	stdlib_ndarray_free( x );
 	free( data );