Remove stray bracket

Author: raydiak

S12-objects.pod

@@ -1692,7 +1692,7 @@ The constraint implied by the sigil also counts as part of the official type.
 The sigil is actually a constraint on the container, so the actual
 type of the parameter above is something like:
 
-    Positional[subset :: of Any where Foo & Bar }]
+    Positional[subset :: of Any where Foo & Bar]
 
 Static C<where> clauses also count as part of the official type.
 A C<where> clause is considered static if it can be applied to