Revert "Left align the welcome title (#8700)"

This reverts commit 49349e5.

Author: mrubens

webview-ui/src/components/welcome/WelcomeView.tsx

@@ -62,7 +62,7 @@ const WelcomeView = () => {
 		<Tab>
 			<TabContent className="flex flex-col gap-4 p-6">
 				<RooHero />
-				<h2 className="mt-0 mb-4 text-xl">{t("welcome:greeting")}</h2>
+				<h2 className="mt-0 mb-4 text-xl text-center">{t("welcome:greeting")}</h2>
 
 				<div className="text-base text-vscode-foreground py-2 px-2 mb-4">
 					<p className="mb-3 leading-relaxed">