[clang-format] NFC update the ClangFormatStyleOption.rst following previous change

[MyDeveloperDay]

Summary

clang/docs/tool/dump_format_style.py was not run as part of D99840: [clang-format] Correctly attach enum braces with ShortEnums disabled

Bring ClangFormatStyleOptions.rst back in line.

clang/docs/ClangFormatStyleOptions.rst

**AllowShortEnumsOnASingleLine** (``bool``)
   Allow short enums on a single line.
 
   .. code-block:: c++
 
     true:
     enum { A, B } myEnum;
 
     false:
-    enum
-    {
+    enum {
       A,
       B
     } myEnum;
 
 **AllowShortFunctionsOnASingleLine** (``ShortFunctionStyle``)
   Dependent on the value, ``int f() { return 0; }`` can be put on a
   single line.