[cmake] Update ProGraML header path for library discovery.

Author: ChrisCummins

build_tools/cmake/FindProGraML.cmake

@@ -71,7 +71,7 @@ endif()
 find_library(ProGraML_proto_programl_cc_LIBRARIES
   ${CMAKE_STATIC_LIBRARY_PREFIX}programl${CMAKE_STATIC_LIBRARY_SUFFIX}
   PATH_SUFFIXES programl/proto)
-find_path(ProGraML_proto_programl_cc_INCLUDE_DIRS programl/proto/program_graph_options.pb.h)
+find_path(ProGraML_proto_programl_cc_INCLUDE_DIRS programl/proto/program_graph.pb.h)
 if (ProGraML_proto_programl_cc_LIBRARIES AND ProGraML_proto_programl_cc_INCLUDE_DIRS)
   add_library(ProGraML::proto::programl_cc UNKNOWN IMPORTED)
   set_target_properties(ProGraML::proto::programl_cc PROPERTIES