ensure the correct state component is loaded when hasSHAChanged == true

spec/javascripts/vue_mr_widget/stores/get_state_key_spec.js

@@ -25,6 +25,9 @@ describe('getStateKey', () => {
     context.canBeMerged = true;
     expect(bound()).toEqual('readyToMerge');
+    context.hasSHAChanged = true;
+    expect(bound()).toEqual('shaMismatch');
+
     context.isPipelineBlocked = true;
     expect(bound()).toEqual('pipelineBlocked');