[ryml] update to 0.7.2

[wikiwang1991]

• 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.

[Cheney-W]

Failure:

CMake Error at ext/c4core/cmake/c4Project.cmake:1181 (find_program):
  Could not find GIT using the following names: git
Call Stack (most recent call first):
  ext/c4core/cmake/c4Project.cmake:1023 (c4_proj_get_version)
  ext/c4core/cmake/c4Project.cmake:964 (c4_set_default_pack_properties)
  CMakeLists.txt:116 (c4_pack_project)

Logs:
https://dev.azure.com/vcpkg/public/_build/results?buildId=111134&view=artifacts&pathAsName=false&type=publishedArtifacts

[wikiwang1991]

jsonnet is still using ryml 0.5.0...

[wikiwang1991]

@Cheney-W 这个咋搞？下游有个包依赖老版本，就把上游版本锁死了不能更新，要是更新下游，又因为依赖新版本上游，不能更新，死锁了
The jsonnet depends ryml 0.5.0, which locks the ryml version and prevents updates. If the jsonnet is updated, it will depend on the new version of the ryml, and thus cannot be updated either, resulting in a deadlock.

[Cheney-W]

I think you can update both ryml and jsonnet in this PR.