Roll rapidjson (#16347)

Rolls rapidjson forward to the next mirrored version. This is needed to
pick up fixes to building with clang on Windows, to support
flutter/flutter#16256.

Author: stuartmorgan-g

DEPS

@@ -152,7 +152,7 @@ deps = {
    Var('fuchsia_git') + '/third_party/googletest' + '@' + '3fef9015bfe7617d57806cd7c73a653b28559fae',
 
   'src/third_party/rapidjson':
-   Var('fuchsia_git') + '/third_party/rapidjson' + '@' + '32d07c55db1bb6c2ae17cba4033491a667647753',
+   Var('fuchsia_git') + '/third_party/rapidjson' + '@' + 'ef3564c5c8824989393b87df25355baf35ff544b',
 
   'src/third_party/harfbuzz':
    Var('fuchsia_git') + '/third_party/harfbuzz' + '@' + 'f5c000538699a4e40649508a44f41d37035e6c35',