test: use correct variable name in math/base/special/atanf test

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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Author: Planeshifter

lib/node_modules/@stdlib/math/base/special/atanf/test/test.native.js

@@ -63,7 +63,7 @@ var hugePositive = require( './fixtures/julia/huge_positive.json' );
 
 tape( 'main export is a function', opts, function test( t ) {
 	t.ok( true, __filename );
-	t.strictEqual( typeof atan, 'function', 'main export is a function' );
+	t.strictEqual( typeof atanf, 'function', 'main export is a function' );
 	t.end();
 });