fix(docs): disable swcHtmlMinimizer and fix broken links

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.

apps/docs/docusaurus.config.ts

@@ -29,6 +29,9 @@ const config: Config = {
       fasterByDefault: true,
       mdx1CompatDisabledByDefault: false,
     },
+    faster: {
+      swcHtmlMinimizer: false,
+    },
   },
 
   markdown: {