message: Update installation instructions now that plugin is integrated in Backstage
  Existing instructions assumed that the plugin was sourced in a separate Git
  repository. Instructions have been simplified now that the plugin is integrated
  into the main Backstage repository.
diff: @@ -4,30 +4,13 @@ Welcome to the apache-airflow plugin!
  ## Installation
  -1. Clone the plugin repository to the plugins directory.
  +1. Install the plugin with `yarn` in the root of your Backstage directory
  ```sh
  -git clone \
  - git@github.com:cmpadden/backstage-apache-airflow-plugin.git \
  - plugins/apache-airflow
  +yarn --cwd packages/app add @backstage/plugin-apache-airflow
  ```
  -2. Add the plugin dependency in `app/package.json`
  -
  -```diff
  ---- a/packages/app/package.json
  -+++ b/packages/app/package.json
  -@@ -11,6 +11,7 @@
  - "@backstage/core-components": "^0.7.4",
  - "@backstage/core-plugin-api": "^1.2.0",
  - "@backstage/integration-react": "^0.1.14",
  -+ "@backstage/plugin-apache-airflow": "^0.0.0",
  - "@backstage/plugin-api-docs": "^0.6.14",
  - "@backstage/plugin-azure-devops": "^0.1.4",
  - "@backstage/plugin-badges": "^0.2.14",
  -```
  -
  -3. Import and use the plugin extension in `spp/src/App.tsx`
  +2. Import and use the plugin extension in `spp/src/App.tsx`
  ```diff
  --- a/packages/app/src/App.tsx
  