message: readme file changes
diff: @@ -18,7 +18,7 @@ To generate a New Relic API Key , you can visit this [link](https://one.newrelic
  ```
  // app-config.yaml
  proxy:
  - '/newrelic/apm/api':
  + '/newrelic/api':
  target: https://api.newrelic.com
  headers:
  X-Api-Key: ${NEW_RELIC_USER_KEY}
  @@ -30,8 +30,8 @@ proxy:
  // In packages/app/src/components/catalog/EntityPage.tsx
  import {
  isNewRelicDashboardAvailable,
  - EntityNewRelicDashboard,
  - EntityPageNewRelicDashboard,
  + EntityNewRelicDashboardContent,
  + EntityNewRelicDashboardCard,
  } from '@backstage/plugin-newrelic-dashboard';
  const serviceEntityPage = (
  @@ -42,7 +42,7 @@ const serviceEntityPage = (
  path="/newrelic-dashboard"
  title="New Relic Dashboard"
  >
  - <EntityNewRelicDashboard />
  + <EntityNewRelicDashboardContent />
  </EntityLayout.Route>
  ```
  @@ -54,7 +54,7 @@ const overviewContent = (
  <EntitySwitch>
  <EntitySwitch.Case if={isNewRelicDashboardAvailable}>
  <Grid item md={6} xs={12}>
  - <EntityPageNewRelicDashboard />
  + <EntityNewRelicDashboardCard />
  </Grid>
  </EntitySwitch.Case>
  </EntitySwitch>
  