bench: fix allocations to ensure 1:1 comparison across array types

---
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: passed
  - 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: na
  - 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/array/float16/benchmark/benchmark.copy_within.js

@@ -33,7 +33,7 @@ bench( format( '%s:copyWithin', pkg ), function benchmark( b ) {
 	var arr;
 	var i;
 
-	arr = new Float16Array( uniform( 10, 0.0, 10.0 ) );
+	arr = new Float16Array( uniform( 2, 0.0, 10.0 ) );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {