Suppress a new Jammy warning (backport #85)

[mergify]

/home/mjcarroll/workspaces/gz_garden/src/gz-plugin/test/integration/factory.cc: In member function ‘virtual void Factory_Alias_Test::TestBody()’:
/home/mjcarroll/workspaces/gz_garden/src/gz-plugin/test/integration/factory.cc:118:27: warning: loop variable ‘alias’ of type ‘const string&’ {aka ‘const std::__cxx11::basic_string<char>&’} binds to a temporary constructed from type ‘const char* const’ [-Wrange-loop-construct]
  118 |   for (const std::string &alias : {
      |                           ^~~~~
/home/mjcarroll/workspaces/gz_garden/src/gz-plugin/test/integration/factory.cc:118:27: note: use non-reference type ‘const string’ {aka ‘const std::__cxx11::basic_string<char>’} to make the copy explicit or ‘const char* const&’ to prevent copying

Signed-off-by: Michael Carroll michael@openrobotics.org

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This is an automatic backport of pull request #85 done by Mergify.