Update DOM benchmarks

[carlosame]

The DOM benchmarks at https://css4j.github.io/dom-mark.html are outdated. The version of css4j benchmarked was 3.2, and although the DOM implementation hasn't changed much since then, it is time to upgrade. Also, the latest Jsoup version is now much faster on the DOM modification benchmark.

[carlosame]

The new benchmarks are being run on the same hardware as the old, but with a different energy configuration:

• Intel® Core™ i5-1035G7 CPU and 8GB of RAM.
• Energy mode: balanced.
• Gaming mode.

The software:

• Windows 11 24H2.
• Temurin OpenJDK 25.
• css4j 6.1.
• dom4j 2.2.0.
• Jsoup 1.21.2.
• validator.nu htmlparser: 1.4.16.
• JMH 1.37.

Here is one example from the new batch: new benchmark is on the left, old on the right:

[carlosame]

The new benchmarks are now available and Jsoup performs much better in DOM modification thanks to the changes made by @jhy.

Jsoup was also added to the XML benchmarks and it performs well except for the 38kB XHTML document sibling traversal.