[Bug c/120512] New: Wmissing-field-initializers mentions C++'s `{}` but that is also valid for C23 too

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120512

            Bug ID: 120512
           Summary: Wmissing-field-initializers mentions C++'s `{}` but
                    that is also valid for C23 too
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Keywords: documentation
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wmissing-field-initializers
:
```
Likewise, in C++ this option does not warn about the empty { } initializer, for
example:

...
```

This should be expanded to mention C23.