Update dependency @gitlab/ui to v21.28.0

package.json

@@ -43,7 +43,7 @@
     "@babel/preset-env": "^7.10.1",
     "@gitlab/at.js": "1.5.5",
     "@gitlab/svgs": "1.171.0",
-    "@gitlab/ui": "21.27.0",
+    "@gitlab/ui": "21.28.0",
     "@gitlab/visual-review-tools": "1.6.1",
     "@rails/actioncable": "^6.0.3-3",
     "@rails/ujs": "^6.0.3-2",

yarn.lock

@@ -866,10 +866,10 @@
   resolved "https://registry.yarnpkg.com/@gitlab/svgs/-/svgs-1.171.0.tgz#abc3092bf804f0898301626130e0f3231834924a"
   integrity sha512-TPfdqIxQDda+0CQHhb9XdF50lmqDmADu6yT8R4oZi6BoUtWLdiHbyFt+RnVU6t7EmjIKicNAii7Ga+f2ljCfUA==
 
-"@gitlab/ui@21.27.0":
-  version "21.27.0"
-  resolved "https://registry.yarnpkg.com/@gitlab/ui/-/ui-21.27.0.tgz#4463adc552bb7b7f9a22e0a0281ca761a3daa70a"
-  integrity sha512-9bMZZebdXWXhPnXbklcragfGosNwZEcqulITWvPSwXcFJwNk2xEHpKy7b/SwQMcErpDjne/eduEnWEGtT+aFNw==
+"@gitlab/ui@21.28.0":
+  version "21.28.0"
+  resolved "https://registry.yarnpkg.com/@gitlab/ui/-/ui-21.28.0.tgz#28455d9f53ed34c0b17ea8e1073b670c59617032"
+  integrity sha512-skhWKaC3hzWpLA6GoDLG5qJqdgRhYNfAtE2W7pONyfi21eUgZuMbzCVSX3dYLm6v2LEBsJRZXbguWmCOT2ZilQ==
   dependencies:
     "@babel/standalone" "^7.0.0"
     "@gitlab/vue-toasted" "^1.3.0"