Update list-patterns.md

proposals/list-patterns.md

@@ -109,7 +109,7 @@ All multi-dimensional arrays can be non-zero-based. We can either cut this suppo
 
 
 The following rules determine if a pattern is valid for a multi-dimensional array:
-- For an array of rank N, only N level of nested list-patterns are accepted.
+- For an array of rank N, only N-1 level of nested list-patterns are accepted.
 - Except for that last level, all subpatterns must be either a slice pattern without a subpattern (`..`) or a list-pattern.
 - For slice patterns, the usual rules apply - only permitted once and only directly inside the pattern.
 - All nested list-patterns must be of an exact or minimum size. Given X = the minimum or exact required length so far and Y = the new length from current nested list pattern, the expected size is calculated as follow: