Improve make a release docs

[sverhoeven]

In make a release preps

• First step should be to decide which version you are going to release, major, minor or batch
• swap version up (step 2) and CITATION.cff (step 3) as version needs to be updated in CITATION.cff
• last step should be to update DOI in CITATION.cff after Zenodo entry is updated.
• step 3 should link to versioning chapter
• Besides updating example report also test if reports dynamic features (sort/search/paging) still work
• Instead of doing test installation with OS python use a virtual environment so OS python or ~/bin is not polluted
• pypitest should be test.pypi.org
• document what version/title/description to use during GitHub release creation
• After docker build test whether image works with for example docker run fairsoftware/fairtally --version