ci: Restore `.python-version` with correct version (#21816)
ci: Restore `.python-version` with correct version (#21816)

it turns out that the github `setup-python` action reads this file
with our current configuration

this restores the file, but with the correct python version

Signed-off-by: Ryan Northey <ea3cd978650417470535f3a4725b6b5042a6ab59@synca.io>
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