fix: Update documentations after EL9 update

Description

After EL9 new pyenv needs to be used. I update the documentation for installing pycalibration with the correct pyenv.

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Types of changes

• Docs (changes to the documentation)

Checklist:

Reviewers

@roscar

added 1 commit

• d0a07b52 - fix: Update documentations after EL9 update

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approved this merge request

merged

mentioned in commit 60eb5913

changed milestone to %3.14.3