[cppgraphqlgen] Fix build error under linux

[jimwang118]

Fixed the following error via upstream PR.

/usr/include/c++/13/bits/unique_ptr.h:99:9: error: ‘void operator delete(void*, std::size_t)’ called on unallocated object ‘<anonymous>’ [-Werror=free-nonheap-object]
   99 |         delete __ptr;
      |         ^~~~~~~~~~~~
/root/vcpkg/buildtrees/cppgraphqlgen/src/v4.5.5-147cf636ad.clean/src/GraphQLResponse.cpp: In constructor ‘graphql::response::Value::Value(graphql::response::Type)’:
/root/vcpkg/buildtrees/cppgraphqlgen/src/v4.5.5-147cf636ad.clean/src/GraphQLResponse.cpp:931:47: note: declared here
  931 |                         _data = { EnumData {} };
      |                                               ^
cc1plus: all warnings being treated as errors

• 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.

All features passed with following triplets:

x64-windows
x64-linux

[JavierMatosD]

If this is an upstream patch, please download and apply the patch rather than checking it in.

[data-queue]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[data-queue]

Can we use a URL that references the commit id since this PR was merged? I think it is more stable