Fix aliance renewal question (extension-prompt) staying open (#4196)

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Resolves #4164

## Description:

Single line change, making sure the ActionableEvent is updated after
removing the alliance that just ended.

## Please complete the following:

- [x] I have added screenshots for all UI updates
-# There are none
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
-# There are none
- [x] I have added relevant tests to the test directory
-# I do not know how I would to it.

## Please put your Discord username so you can be contacted if a bug or
regression is found:

Katokoda

src/client/hud/layers/ActionableEvents.ts

@@ -185,6 +185,7 @@ export class ActionableEvents extends LitElement implements Controller {
       if (!currentAllianceIds.has(allianceId)) {
         this.removeAllianceRenewalEvents(allianceId);
         this.alliancesCheckedAt.delete(allianceId);
+        this.requestUpdate();
       }
     }
   }