[v20x backport] deps: update undici to 6.19.8
Update Undici to v6.19.8 using ./tools/dep_updaters/update-undici.sh
This will backport https://github.com/nodejs/undici/pull/3445 to v20 and close the loop on https://github.com/nodejs/node/issues/54274#issuecomment-2311433537
If you believe this PR should be highlighted in the Node.js CHANGELOG please add the
notable-change
label.
I don't think I'm able to add a label to this PR, but I believe this should be in the CHANGELOG
All tests passed.
Test pass locally when running make -j4 test