perf: use promise.all in /apps/installed (calcom#23146)

Author: hbjORbj

apps/web/app/(use-page-wrapper)/apps/installed/[category]/page.tsx

@@ -45,11 +45,13 @@ const InstalledAppsWrapper = async ({ params }: PageProps) => {
     createRouterCaller(appsRouter),
   ]);
 
-  const connectedCalendars = await calendarsCaller.connectedCalendars();
-  const installedCalendars = await appsCaller.integrations({
-    variant: "calendar",
-    onlyInstalled: true,
-  });
+  const [connectedCalendars, installedCalendars] = await Promise.all([
+    calendarsCaller.connectedCalendars(),
+    appsCaller.integrations({
+      variant: "calendar",
+      onlyInstalled: true,
+    }),
+  ]);
 
   return (
     <InstalledApps