Only accept correct change IDs in "Created a revert ..." messages

A user has reported a malformed revert message resulting in an error
popup. So let's make sure that change IDs are valid.

Release-Notes: skip
Google-Bug-Id: b/294786166
Change-Id: Ifa3d3a94712a2424364b17fd31b0337a528aea1a
diff --git a/polygerrit-ui/app/models/change/related-changes-model_test.ts b/polygerrit-ui/app/models/change/related-changes-model_test.ts
index 295f284..0bf7a76 100644
--- a/polygerrit-ui/app/models/change/related-changes-model_test.ts
+++ b/polygerrit-ui/app/models/change/related-changes-model_test.ts
@@ -270,7 +270,8 @@
         messages: [
           {
             ...createChangeMessage(),
-            message: 'Created a revert of this change as 123',
+            message:
+              'Created a revert of this change as If02ca1cd494579d6bb92a157bf1819e3689cd6b1',
             tag: MessageTag.TAG_REVERT as ReviewInputTag,
           },
         ],