patch 8.2.2455: Vim9: key type for literal dict and indexing is inconsistent

Problem:    Vim9: key type that can be used for literal dict and indexing is
            inconsistent.
Solution:   Allow using number and bool as key for a literal dict. (#7771)

runtime/doc/vim9.txt

@@ -548,6 +548,12 @@ In case the key needs to be an expression, square brackets can be used, just
 like in JavaScript: >
 	var dict = {["key" .. nr]: value}
 
+The key type can be string, number, bool or float.  Other types result in an
+error.  A number can be given with and without the []: >
+	var dict = {123: 'without', [456]: 'with'}
+	echo dict
+	{'456': 'with', '123': 'without'}
+
 
 No :xit, :t, :append, :change or :insert ~