Fix wrong file name in readme and remove unnecessary type parameter

Signed-off-by: Niklas Granander <ngranander@spotify.com>

plugins/xcmetrics/README.md

@@ -26,7 +26,7 @@ import { XcmetricsPage } from '@backstage/plugin-xcmetrics';
 </FlatRoutes>
 ```
 
-Add the URL to your XCMetrics backend instance in `app-config.yml` like so:
+Add the URL to your XCMetrics backend instance in `app-config.yaml` like so:
 
 ```yaml
 proxy:

plugins/xcmetrics/src/components/OverviewComponent/OverviewComponent.tsx

@@ -109,7 +109,7 @@ export const OverviewComponent = () => {
       <ContentHeader title="XCMetrics Dashboard">
         <SupportButton>Dashboard for XCMetrics</SupportButton>
       </ContentHeader>
-      <Table<BuildItem>
+      <Table
         options={{ paging: false, search: false }}
         data={builds}
         columns={columns}