Squiz/FunctionDeclarationArgumentSpacing: fix typo in `SpacingAfterVi… #996

Job	Run time
QuickTest: PHP 7.2 (Win)	1m 8s
QuickTest: PHP latest (Linux ARM)	53s
QuickTest: PHP 8.1 (Linux ARM)	1m 17s
QuickTest: PHP 7.2 (Linux ARM)	1m 53s
QuickTest: PHP 8.1 (Win)	1m 16s
QuickTest: PHP latest (Win)	1m 10s
	7m 37s

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