docs: clarify release instructions in CONTRIBUTING (#181)

Author: tobice

CONTRIBUTING.md

@@ -91,14 +91,18 @@ Beta release happens automatically after you merge a pull request or add a direc
 
 Production release happens after the GitHub release is created. Before you do that check the following:
 
-- Make sure that the beta release with the latest commit is successfully deployed.
-- Make sure that all the changes that happened from the last production release are described in the [CHANGELOG.md](https://github.com/apify/apify-sdk-python/blob/master/CHANGELOG.md).
+- Make sure [here](https://pypi.org/project/apify-client/#history) that the beta release with the latest commit is successfully deployed.
+- Make sure that all changes that happened from the last production release are described in the [CHANGELOG.md](https://github.com/apify/apify-sdk-python/blob/master/CHANGELOG.md) (it's okay to skip DX related changes, repo setup etc).
 - When drafting a new GitHub release:
     - Create a new tag in the format of `v1.2.3` targeting the master branch.
     - Fill in the release title in the format of `1.2.3`.
-    - Copy the changes from the [CHANGELOG.md](https://github.com/apify/apify-sdk-python/blob/master/CHANGELOG.md) and paste them into the release description.
+    - Copy the changes from the [CHANGELOG.md](https://github.com/apify/apify-sdk-python/blob/master/CHANGELOG.md) and paste them into the release description. Make sure that all changes are properly categorized using headlines (`Added`, `Fixed` or `Internal changes`).
     - Check the "Set as the latest release" option.
 
+Currently, there is no explicit approval process, so when you are done with the checklist, proceed with the release.
+
+Once released, manually bump the version in `pyproject.toml` ([PR example](https://github.com/apify/apify-client-python/pull/180)).
+
 ## Maintanance
 
 ### Removing Support for an outdated Python version