[ML] Fixing edit calendar locator (elastic#200681)

Fixing a typo in the ML locator switch statement which is missing a
`break` for the edit calendar page.
Bug introduced in elastic#193605

Currently there are no instances where the locator is used to find this
page, so this is not something which will affect the user, but it needs
still fixing.

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(cherry picked from commit 2d970dc)

x-pack/plugins/ml/public/locator/ml_locator.ts

@@ -125,6 +125,7 @@ export class MlLocatorDefinition implements LocatorDefinition<MlLocatorParams> {
         break;
       case ML_PAGES.CALENDARS_EDIT:
         path = formatEditCalendarUrl('', params.pageState);
+        break;
       case ML_PAGES.CALENDARS_DST_EDIT:
         path = formatEditCalendarDstUrl('', params.pageState);
         break;