[mcap] update to 2.1.1

[toge]

• 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.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

https://github.com/foxglove/mcap/releases/tag/releases%2Fcpp%2Fv2.1.1

[antkmsft]

microsoft/vcpkg-tool#1817 bug fix

[BillyONeal]

Thanks!