bump to alpha 28

Author: evwilkin

package.json

@@ -79,9 +79,9 @@
     "webpack-merge": "^5.9.0"
   },
   "dependencies": {
-    "@patternfly/react-core": "6.0.0-alpha.19",
-    "@patternfly/react-icons": "6.0.0-alpha.9",
-    "@patternfly/react-styles": "6.0.0-alpha.9",
+    "@patternfly/react-core": "6.0.0-alpha.28",
+    "@patternfly/react-icons": "6.0.0-alpha.11",
+    "@patternfly/react-styles": "6.0.0-alpha.11",
     "@storybook/builder-webpack5": "^7.5.3",
     "react": "^18",
     "react-dom": "^18",