gh-141674: Docs: Prepend 'Python' to the HTML short title

[Yzi-Li]

Now:

• Issue: Missing 'The Python' in the <title> tag of index.html #141674

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📚 Documentation preview 📚: https://cpython-previews--141868.org.readthedocs.build/

[Yzi-Li]

I'm not convinced we need to make this change

I think Python 3.15 Documentation looks more like a short title than 3.15.0a2 Documentation.

[picnixz]

I think Python 3.15 Documentation looks more like a short title than 3.15.0a2 Documentation.

IMO, it's important to know the exact version, including micro version. I don't know whether version includes it actually.

[AA-Turner]

[Hugo]

I'm not convinced we need to make this change

I agree it's marginal. I'd be +0.

A