[Stack Monitoring] Remove visible semicolon from LoadingPage (elastic…

…#146500)

Fixes elastic#146342

There was a semicolon added to the JSX markup which would show on slower
devices where loading takes longer.
Please refer to the issue for a screenshot of that.

(cherry picked from commit 5c13741)

x-pack/plugins/monitoring/public/application/pages/loading_page.tsx

@@ -24,7 +24,7 @@ export const LoadingPage = ({ staticLoadingState }: { staticLoadingState?: boole
   if (staticLoadingState) {
     return (
       <PageTemplate title={title}>
-        <PageLoading />;
+        <PageLoading />
       </PageTemplate>
     );
   }