[Glitch] Fix front-end bug when processing relationship-related account actions

Port 287520453c to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/reducers/relationships.js

@@ -73,6 +73,7 @@ export default function relationships(state = initialState, action) {
   case ACCOUNT_UNMUTE_SUCCESS:
   case ACCOUNT_PIN_SUCCESS:
   case ACCOUNT_UNPIN_SUCCESS:
+    return normalizeRelationship(state, action.relationship);
   case RELATIONSHIPS_FETCH_SUCCESS:
     return normalizeRelationships(state, action.relationships);
   case submitAccountNote.fulfilled: