fix(stats): syntax error

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
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    status: na
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    status: na
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    status: na
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    status: na
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  - task: lint_typescript_declarations
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    status: passed
---

Author: hans2001

lib/node_modules/@stdlib/stats/incr/nanmpcorr/test/test.js

@@ -200,9 +200,9 @@ function datasets( N, M, seed ) {
 					y = NaN;
 				}
 			}
-			tmp.append( [ x, y ] );
+			tmp.push( [ x, y ] );
 		}
-		data.append( tmp );
+		data.push( tmp );
 	}
 	return data;
 }