Docs: update reproducible builds guide

[duboism]

As discussed in #10924, we propose to update the reproducible builds guide (docs/user/guides/reproducible-builds.rst). The goals are:

• update instruction for config v2 file
• clarify that versions in the guide are just example and not recommended
• don't use the buggy sphinx=5.3.0 in the example

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📚 Documentation previews 📚

• User's documentation (docs): https://docs--10939.org.readthedocs.build/en/10939/

• Developer's documentation (dev): https://dev--10939.org.readthedocs.build/en/10939/

[duboism]

I finished the main proposed modifications.

However, I don't understand the "✅ Good:" badge in Pin your transitive dependencies. Any thoughts ?

[humitos]

Thanks for the PR! I think it's good and ready to merge after some small changes 👍🏼

[duboism]

Sorry for the delay. I commented on the various points you raised and modified the code.

[duboism]

Any news ?