minor #5649 DX: YodaStyleFixerTest - fix 8.0 compat (keradus)

This PR was merged into the 3.0 branch.

Discussion
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DX: YodaStyleFixerTest - fix 8.0 compat

Commits
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5a596d9 DX: YodaStyleFixerTest - fix 8.0 compat

tests/Fixer/ControlStructure/YodaStyleFixerTest.php

@@ -1003,7 +1003,7 @@ public function provideFixPrePHP80Cases()
      * @dataProvider provideFix80Cases
      * @requires PHP 8.0
      */
-    public function testFix80(string $expected, string $input, array $config = []): void
+    public function testFix80(string $expected, ?string $input = null, array $config = []): void
     {
         $this->fixer->configure($config);
         $this->doTest($expected, $input);