message: Update plugin readme
diff: @@ -18,14 +18,21 @@ The Airbrake plugin provides connectivity between Backstage and Airbrake (https:
  yarn add --cwd packages/backend @backstage/plugin-airbrake-backend
  ```
  -3. Add the `EntityAirbrakeContent` to `packages/app/src/components/catalog/EntityPage.tsx` for all the entity pages you want Airbrake to be in:
  +3. Add the `EntityAirbrakeContent` and `isAirbrakeAvailable` to `packages/app/src/components/catalog/EntityPage.tsx` for all the entity pages you want Airbrake to be in:
  ```typescript jsx
  - import { EntityAirbrakeContent } from '@backstage/plugin-airbrake';
  + import {
  + EntityAirbrakeContent,
  + isAirbrakeAvailable,
  + } from '@backstage/plugin-airbrake';
  const serviceEntityPage = (
  <EntityLayoutWrapper>
  - <EntityLayout.Route path="/airbrake" title="Airbrake">
  + <EntityLayout.Route
  + if={isAirbrakeAvailable}
  + path="/airbrake"
  + title="Airbrake"
  + >
  <EntityAirbrakeContent />
  </EntityLayout.Route>
  </EntityLayoutWrapper>
  @@ -33,7 +40,11 @@ The Airbrake plugin provides connectivity between Backstage and Airbrake (https:
  const websiteEntityPage = (
  <EntityLayoutWrapper>
  - <EntityLayout.Route path="/airbrake" title="Airbrake">
  + <EntityLayout.Route
  + if={isAirbrakeAvailable}
  + path="/airbrake"
  + title="Airbrake"
  + >
  <EntityAirbrakeContent />
  </EntityLayout.Route>
  </EntityLayoutWrapper>
  @@ -41,7 +52,11 @@ The Airbrake plugin provides connectivity between Backstage and Airbrake (https:
  const defaultEntityPage = (
  <EntityLayoutWrapper>
  - <EntityLayout.Route path="/airbrake" title="Airbrake">
  + <EntityLayout.Route
  + if={isAirbrakeAvailable}
  + path="/airbrake"
  + title="Airbrake"
  + >
  <EntityAirbrakeContent />
  </EntityLayout.Route>
  </EntityLayoutWrapper>
  