FIR: Update diagnostics test data

Green code correctly became red

compiler/testData/diagnostics/tests/inference/completion/kt33166.fir.kt

@@ -31,7 +31,7 @@ fun f1(future: OurFuture<String>, e: Either.Left<String>) {
             true -> OurFuture.createOurFuture(e)
             else -> throw Exception()
         }
-        x
+        <!ARGUMENT_TYPE_MISMATCH!>x<!>
     }
 }
 
@@ -42,4 +42,4 @@ fun f2(future: OurFuture<String>, e: Either.Left<String>) {
             else -> throw Exception()
         }
     }
-}
+}