Change default RE platform in HHBBC extern-worker

Summary: Last place which should be updated to the new platform

Reviewed By: rafael-munoz

Differential Revision: D89375655

fbshipit-source-id: ba58e2137576640ba048fd364915823a8f2bed25

Author: johnny90

hphp/util/extern-worker.h

@@ -515,7 +515,7 @@ struct Options {
   int m_acConnectionCount{16};
   std::string m_application{""};
   std::string m_useCase{""};
-  std::string m_platform{"linux-remote-execution"};
+  std::string m_platform{"releng_www_hhbbc"};
   std::string m_featuresFile{""};
   std::string m_workerPath{""};
   std::string m_zstdDictionaryPath{""};