github: update the github-action versions to fix some warnings about nodejs-20 instead of nodejs-24

[svalat]

Target

Try to avoid the warning about NodeJS-20 instead of NodeJS-24 in github actions.

In theory updating the versions of the action libraries used in the project should avoid the warning.

I updated to last release available :

• actions/checkout : 3.6.0 -> 7.0.1
• actions/setup-python : 4.9.1 -> 6.3.0 (there is a 7.0.0 just released one month ago, but I preferred to used the last stable one).
• pre-commit/action : 3.0.0 -> 3.0.1
• pre-commit-ci/lite-action : 1.0.0 -> 1.0.1

Pointers

Migration to NodeJS-24 is effective since 16 june 2026 : https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Warning solved

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v3, actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744, actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c, pre-commit-ci/lite-action@50143aaf27e2c42e75a5e06185a471d9582e89df. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Still

The port to NodeJS-24 is not yet done "a priori" for pre-commit-ci/lite-action so the upgrade do not solve it. To be seen later.

[neutrinoceros]

I'd recommend setting up dependabot to automate these upgrades. It now supports arbitrary cooldown periods so you can easily exclude too-new versions.