Documentation: Update RELEASING file specifying the correct file for …

…the version

RELEASING.md

@@ -1,11 +1,11 @@
 # Releasing a new version
 
 Publication in pypi is made automatically by a GitHub action. The action is executed when a tag starting with "v" is pushed to main.
-The tag must correspond to the version of `bumpversion.cfg`.
+The version must coincide with ceruleo/__init__.py:__version__
 
 ```bash 
 git tag -a "v2.0.0" -m "Description of the release"
 ```
 
 
-After the publication in pypi, a tag is created and a release is uploaded to github.
+After the publication in pypi, a tag is created and a release is uploaded to github.