style(settings): centraliza botão Alterar senha

Remove justify-start para centralizar conteúdo como o botão Encerrar sessão.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/components/settings/settings-content.tsx

@@ -257,7 +257,7 @@ export function SettingsContent() {
                 </CardDescription>
               </CardHeader>
               <CardContent className="space-y-2">
-                <Button variant="outline" size="sm" className="w-full justify-start gap-2" asChild>
+                <Button variant="outline" size="sm" className="w-full gap-2" asChild>
                   <Link href="/recuperar">
                     <Key className="size-4" />
                     Alterar senha