Tech Report: Add heading links

[tunetheweb]

It would be nice to be able to do this:

https://httparchive.org/reports/techreport/tech?tech=WordPress&geo=ALL&rank=ALL#adoption

Also we should have anchor links. In the Web Almanac we show those on hover so maybe could be consistent with that style?:

https://almanac.httparchive.org/en/2024/cdn#what-is-a-cdn

We do similar in reports, but without the symbol:
https://httparchive.org/reports/state-of-the-web#reqTotal

[sarahfossheim]

PR: #1044

[tunetheweb]

Fixed in #1044