Bump paywall plan heading size.

Increase the “Choose a plan” title for better hierarchy in the right panel.

Co-authored-by: Cursor <cursoragent@cursor.com>

google_apps/PremiumFeaturesView.swift

@@ -186,7 +186,7 @@ struct PremiumFeaturesView: View {
 
                 VStack(alignment: .leading, spacing: 18) {
                     Text("Choose a plan")
-                        .font(.system(size: 20, weight: .bold))
+                        .font(.system(size: 22, weight: .bold))
                         .foregroundStyle(primaryTextColor)
 
                     planCardsStack(compactPricing: false)