Make _symtable_entry.ste_type's comment consistent wit _Py_block_ty (p…

…ython#92414)

_Py_block_ty defines four types of block, FunctionBlock, ClassBlock, ModuleBlock and AnnotationBlock.
But _symtable_entry.ste_type only comments three of them, I think it's better both sides are consistent.

Include/internal/pycore_symtable.h

@@ -49,7 +49,7 @@ typedef struct _symtable_entry {
     PyObject *ste_varnames;  /* list of function parameters */
     PyObject *ste_children;  /* list of child blocks */
     PyObject *ste_directives;/* locations of global and nonlocal statements */
-    _Py_block_ty ste_type;   /* module, class or function */
+    _Py_block_ty ste_type;   /* module, class, function or annotation */
     int ste_nested;      /* true if block is nested */
     unsigned ste_free : 1;        /* true if block has free variables */
     unsigned ste_child_free : 1;  /* true if a child block has free vars,