add release info to README (#10)

Author: anakin87

README.md

@@ -20,3 +20,11 @@ pip install haystack-pydoc-tools
 ## License
 
 `haystack-pydoc-tools` is distributed under the terms of the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license.
+
+## Release process
+To release version `x.y.z`:
+
+1. Manually update the version in `src/haystack_pydoc_tools/__about__.py` (via a PR or a direct push to `main`).
+2. From the `main` branch, create a tag locally: `git tag vx.y.z`.
+3. Push the tag: `git push --tags`.
+4. Wait for the CI to release the package on PyPI.