Increase sidebar upgrade button height slightly.

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

Reddit App/Views/SidebarView.swift

@@ -125,7 +125,7 @@ struct SidebarView: View {
                 .font(.system(size: 11, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(maxWidth: .infinity)
-                .padding(.vertical, 6)
+                .padding(.vertical, 7.5)
                 .background(AppTheme.accentPurple)
                 .clipShape(RoundedRectangle(cornerRadius: 8))
                 .buttonStyle(AppPrimaryButtonStyle())