Merge and release next version with fixed do_git_release.sh

Former-commit-id: 20707678

pygeodyn/release/do_git_release.sh

 #!/usr/bin/env bash
 
-VERSION_NB=$(cat VERSION.txt)
+# Paths are relative to the repo folder
+VERSION_NB=$(grep -o "[0-9]\.[0-9]\.[0-9]" pygeodyn/_version.py)
 #CHANGES=$(cat changes.log)
 
-git rm release/RELEASE.md
-git add VERSION.txt
+git rm pygeodyn/release/RELEASE.md
+git add pygeodyn/_version.py
 git add CHANGELOG.md
 git commit -m "Update to $VERSION_NB"
 git tag "$VERSION_NB"