chore: Rename backendOverviewPage.spec to match file under test (#87239)

Author: ryan953

static/app/views/insights/pages/backend/frontendOverviewPage.spec.tsx static/app/views/insights/pages/backend/backendOverviewPage.spec.tsx

@@ -36,7 +36,7 @@ const projects = [
 
 let mainTableApiCall: jest.Mock;
 
-describe('Backend', () => {
+describe('BackendOverviewPage', () => {
   beforeEach(() => {
     jest.clearAllMocks();
     setupMocks();