The SWC HTML minifier rejects slightly invalid HTML that browsers
tolerate, breaking the build on every page. Disable it while keeping
all other Docusaurus Faster optimizations.
Also fix broken relative links in after-the-installation.mdx and
donate.mdx by using absolute paths.
GitHub Pages redirects non-trailing-slash URLs with 301, causing
Algolia crawler to ignore all sitemap entries. Setting trailingSlash
to true aligns generated URLs with what GitHub Pages actually serves.
Thomas