[arg-router] Update to v1.2.2

[cmannett85]

• 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.

[jimwang118]

@cmannett85，Thanks for posting this PR, can you provide the full issue number?

[dg0yt]

@jimwang118 These are arg-router issue numbers.
@cmannett85 Normally there is no need to duplicate release notes for official upstream releases.

[jimwang118]

@cmannett85 After the port is installed, there are only header files and no lib. Whether this port is only header files, if so, the usage should be changed to find_path() and target_include_directories().

[dg0yt]

Whether this port is only header files, if so, the usage should be changed to find_path() and target_include_directories().

No? If upstream provides official usage, then vcpkg can't decide something else.

[jimwang118]

The usage has been tested successfully locally. 

find_package()
target_link_library()

[cmannett85]

@cmannett85 After the port is installed, there are only header files and no lib. Whether this port is only header files, if so, the usage should be changed to find_path() and target_include_directories().

@jimwang118 arg_router is provided as a CMake package, the user just needs to find it and link their target to the imported arg_router::arg_router target - which contains the include dir and any dependent packages within its properties. The user should not, and does not, need to care about include directories.