Update README.md

Author: ashitaprasad

doc/dev_guide/README.md

@@ -5,3 +5,5 @@
 3. [How to run tests?](https://github.com/foss42/apidash/blob/main/doc/dev_guide/testing.md)
 4. [Integration Testing](https://github.com/foss42/apidash/blob/main/doc/dev_guide/integration_testing.md)
 5. [List of API Endpoints for Testing](https://github.com/foss42/apidash/blob/main/doc/dev_guide/api_endpoints_for_testing.md)
+6. [Packaging API Dash](https://github.com/foss42/apidash/blob/main/doc/dev_guide/packaging.md)
+7.