[jwsung91-unilink] Update to v0.8.8

[jwsung91]

Updates the jwsung91-unilink port from 0.8.2 to 0.8.8.

Thanks for pointing out on the previous update (#52673) that the installed unilink.pc didn't carry the full static-link dependency set needed by a pkg-config consumer on Windows. That's fixed upstream since v0.8.3 (jwsung91/unilink#430): Libs.private now correctly includes the Windows socket libs (ws2_32/mswsock/iphlpapi) and spdlog when it's bundled.

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version, or no changes were necessary.
• Any fixed CI baseline and CI feature baseline entries are removed from that file, or no entries needed to be changed.
• All patch files in the port are applied and succeed.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.

[BillyONeal]

unilink-static-pkgconfig-repro.zip

GPT 5.5 says that isn't totally fixed:

AI-assisted review found one blocking issue: the installed static Windows pkg-config metadata is still not usable. For jwsung91-unilink:x64-windows-static@0.8.8, unilink.pc emits -lboost_system, but the installed vcpkg Boost 1.91 static triplet has no boost_system.lib/libboost_system.lib because Boost.System is header-only there. A practical pkgconf.exe static consumer finds unilink but fails at link time with LINK : fatal error LNK1181: cannot open input file 'boost_system.lib'.

(I have not totally checked this out myself but thought you'd prefer I post it now rather than wait until I'm back at work for real in the morning :) )