Routing: an unexpected spelling error happened (#57295) (#57305)

(cherry picked from commit bdb97496ec)

Co-authored-by: Leon Sorokin <leeoniya@gmail.com>

public/app/core/navigation/GrafanaRoute.test.tsx

@@ -67,7 +67,7 @@ describe('GrafanaRoute', () => {
 
     setup({ route: { component: PageComponent, path: '' } });
 
-    expect(await screen.findByRole('heading', { name: 'An unexpected error happend' })).toBeInTheDocument();
+    expect(await screen.findByRole('heading', { name: 'An unexpected error happened' })).toBeInTheDocument();
     expect(consoleError).toHaveBeenCalled();
   });
 });

public/app/core/navigation/GrafanaRouteError.tsx

@@ -43,7 +43,7 @@ export function GrafanaRouteError({ error, errorInfo }: Props) {
           </div>
         )}
         {!isChunkLoadingError && (
-          <ErrorWithStack title={'An unexpected error happend'} error={error} errorInfo={errorInfo} />
+          <ErrorWithStack title={'An unexpected error happened'} error={error} errorInfo={errorInfo} />
         )}
       </div>
     </Page>