chore: drop Python 3.10 and add 3.14 to the Python Support matrix

[vdusek]

What & why

The apify Python SDK 4.0.0 (pinned by the python-start template as apify >= 4.0.0, < 5.0.0) requires Python >= 3.11. On Python 3.10 the template's pip install can't resolve apify, so the [python] run tests fail to produce output - see the Python Support (…, 3.10) failures on recent PRs.

Python 3.10 is therefore no longer supported by the SDK the CLI targets.

Changes

• Drop 3.10 from the Python Support test matrix.
• Add 3.14 (already used elsewhere in check.yaml) so the matrix covers the newest Python.

Note

The CLI still declares MINIMUM_SUPPORTED_PYTHON_VERSION = '3.9.0' and prints "Python 3.9 or higher". Aligning that is user-facing and left for a separate change.

✍️ Drafted by Claude Code

[l2ysho]

👍 legit, some thoughts

• should we drop 3.10 also in actor templates?
• MINIMUM_SUPPORTED_PYTHON_VERSION already has some issue/PR? or can we fix it here right away?
• nit (but as you are already in the file): can you align version of python in title vs real one? (here or with MINIMUM_SUPPORTED_PYTHON_VERSION issue/PR)

    - name: Setup Python 3.12 (Windows)
              if: ${{ matrix.os == 'windows-2025' }}
              uses: actions/setup-python@v6
              with:
                  python-version: 3.14

[vdusek]

should we drop 3.10 also in actor templates?

Already happened

MINIMUM_SUPPORTED_PYTHON_VERSION

Updated.

python in title

Removed the version from the title; it shouldn't be there.