Add missing latestworld after parameterized type alias

Fixes #57267

Author: Keno

src/julia-syntax.scm

@@ -1480,6 +1480,7 @@
             `(block
               (= ,rr (where ,type-ex ,@params))
               (,(if allow-local 'assign-const-if-global 'const) ,name ,rr)
+              (latestworld-if-toplevel)
               ,rr)))
       (expand-forms
        `(const (= ,name ,type-ex)))))

test/syntax.jl

@@ -4081,3 +4081,10 @@ end
 
 # Ambiguous 1-arg anymous vs macrosig
 @test_parseerror "function (@foo(a)) end"
+
+# #57267 - Missing `latestworld` after typealias
+abstract type A57267{S, T} end
+@test_nowarn @eval begin
+    B57267{S} = A57267{S, 1}
+    const C57267 = B57267
+end