DOC: More documentation about creating a released package.

RELEASE_GUIDELINES.md

@@ -49,9 +49,10 @@ guidelines of the CaosDB Project
 These steps are necessary for creating the upstream package at Octave's repository:
 
 1. Update Octave-package repository on github.com:
-    1. Create new version release:
+    1. In `packages/caosdb.yaml`, create new version release:
        1. Set `id`: same as tag
        2. Set `date`: today
        3. Set `url`: Use the asset from the Gitlab release, for example [this url](https://gitlab.indiscale.com/caosdb/src/caosdb-octavelib/-/archive/v0.0.1/caosdb-octavelib-v0.0.1.tar.gz).
-       4. Set `sha256`: Download the asset and run `sha256` on it.
+       4. Set `sha256`: Download the asset and run `sha256` on it:  
+          `curl https://gitlab.indiscale.com/[...].tar.bz2 | sha256sum`
     2. Create pull request at https://github.com/gnu-octave/packages .