Update criterion match in input union RFC (#784)

* Update criterion match in input union RFC

* Update Evaluation Overview

Author: dfreeman

rfcs/InputUnion.md

@@ -305,7 +305,7 @@ input union IU = I | { y: Int }
 
 | [1][solution-1] | [2][solution-2] | [3][solution-3] | [4][solution-4] | [5][solution-5] |
 |----|----|----|----|----|
-| ✅⚠️ | ✅⚠️ | ✅ | ⚠️ | ✅ |
+| ✅⚠️ | ✅⚠️ | ✅ | ⚠️ | 🚫 |
 
 Criteria score: 🥉
 
@@ -864,7 +864,7 @@ type Mutation {
 * [E. A member type may be a Leaf type][criteria-e]
   * ✅ Any GraphQL type may be used
 * [F. Migrating a field to a polymorphic input type is non-breaking][criteria-f]
-  * ✅ No migration required, as this pattern is already possible
+  * 🚫 Previously-valid inputs now need to be wrapped in a container object
 * [H. Input unions should accept plain data][criteria-h]
   * ⚠️ The data is wrapped in a (simple) container type
 * [I. Input unions should be easy to upgrade from existing solutions][criteria-i]
@@ -902,7 +902,7 @@ A quick glance at the evaluation results. Remember that passing or failing a spe
 | [C][criteria-c] 🥇 | ✅ | ✅⚠️ | 🚫 | ⚠️ | ✅ |
 | [D][criteria-d] 🥇 | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [E][criteria-e] 🥉 | 🚫 | 🚫 | ✅⚠️ | 🚫 | ✅ |
-| [F][criteria-f] 🥉 | ✅⚠️ | ✅⚠️ | ✅ | ⚠️ | ✅ |
+| [F][criteria-f] 🥉 | ✅⚠️ | ✅⚠️ | ✅ | ⚠️ | 🚫 |
 | [G][criteria-g] 🥉 | ❔ | ❔ | ❔ | ❔ | ❔ |
 | [H][criteria-h] 🥉 | ⚠️ | ⚠️ | ✅ | ✅ | ⚠️ |
 | [I][criteria-i] 🥉 | ✅ | ✅ | ✅ | ⚠️ | ✅ |