Fix docs version #20
Description
https://github.com/scrapy-plugins/scrapy-spider-metadata/blob/main/docs/conf.py has release = "0.0.0", I assume that's why https://scrapy-spider-metadata.readthedocs.io/en/latest/ has 0.0.0 in the title. But I also wonder why there are no versions in the version selector on the docs page (or maybe it's the same issue).