docs: Update package location in repository

- Add directory field to repository info in package.json to reflect
  the package's location within the monorepo
- Update image label to describe image content more accurately

Fixes: #496

Author: flovogt

packages/middleware-code-coverage/README.md

@@ -135,7 +135,7 @@ npm install @ui5/middleware-code-coverage --save-dev
 4. Open "http://localhost:8080/test/unit/unitTests.qunit.html?coverage" in a browser of your choice
 
 5. Check the code coverage
-  ![UI5 logo](./docs/images/sample-app-coverage-data.png)
+  ![Sample for analyzing code coverage](./docs/images/sample-app-coverage-data.png)
 
 ### Configuration
 

packages/middleware-code-coverage/package.json

@@ -20,7 +20,8 @@
 	"license": "Apache-2.0",
 	"repository": {
 		"type": "git",
-		"url": "[email protected]:UI5/cli-extensions.git"
+		"url": "[email protected]:UI5/cli-extensions.git",
+		"directory": "packages/middleware-code-coverage"
 	},
 	"type": "module",
 	"files": [