Ignore i22357a test case in best effort compilation

KacperFKorban · KacperFKorban · commit ecf1a86d6ef4 · 2025-01-22T12:36:14.000+01:00
diff --git a/compiler/test/dotc/neg-best-effort-unpickling.excludelist b/compiler/test/dotc/neg-best-effort-unpickling.excludelist
@@ -15,3 +15,6 @@ overrideClass.scala
 
 # repeating <error> on a top level type definition
 i18750.scala
+
+# Crash on invalid prefix ([A] =>> Int)
+i22357a.scala
