fix: correct copyright year in variancepn example

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type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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---

Author: gururaj1512

lib/node_modules/@stdlib/stats/base/variancepn/examples/index.js

@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2020 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.