package.json: Update prop-types

Author: cockpituous

Diff for: package.json

@@ -57,7 +57,7 @@
     "@patternfly/react-icons": "4.26.4",
     "@patternfly/react-styles": "4.25.4",
     "core-js": "2.6.12",
-    "prop-types": "15.7.2",
+    "prop-types": "15.8.1",
     "react": "17.0.2",
     "react-dom": "17.0.2"
   }