Element identifier used by SvgPathImage should not be hardcoded

[m000]

SvgPathImage.process() uses the hardcoded element id qr-path for the produced svg path:

https://github.com/lincolnloop/python-qrcode/blame/456b01d41f16e0cfb0f70c687848e276b78c3e8a/qrcode/image/svg.py#L149-L159

This is problematic in cases where the svg qrcodes are inlined in a single html document rather than saved as standalone files. Usually this will not break anything, but it may cause annoyances if the output is fed to a tool that attempts to validate the html that contains the qrcodes.

E.g. I am producing an html file with several qrcodes in it, which I then feed to weasyprint to convert to pdf. I get one warning for each subsequent qrcode:

[2024-10-28 21:21:20 WARNING weasyprint/css/targets.py:94] Anchor defined twice: 'qr-path'

I am not sure if there is a use-case for hardcoding an id there, or even for having an id at all. The path element looks easily selectable using a number of DOM selectors, so id="qr-path" can probably go?