This is to resolve CVE-2024-23635 relating to Antisamy 1.7.4.
It's related and similar to #830, however it resolves dependency conflicts and updates 2 test cases as the output we get from Antisamy looks a bit different. I think this is to be expected: as mentioned in the release notes for Antisamy 1.7.5 the output may have changed again:

Note: The upgrade in the HTML parser may alter outputs compared to 1.7.4 and before. This may impact regression tests that involve AntiSamy if they are too strict when comparing a resulting output with the expected one.

Also related to: nahsra/antisamy#389 and nahsra/antisamy#388.