Update python Docker tag from 3.13.13 to v3.14.4 (Dockerfile.nginx-alpine)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
python	stage	minor	3.13.13-alpine3.22 → 3.14.4-alpine3.22
python	final	minor	3.13.13-slim-trixie → 3.14.4-slim-trixie
python	final	minor	3.13.13-alpine3.22 → 3.14.4-alpine3.22

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[mtesauro]

We're staying on Python 3.13.x for now

[renovate]

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