Fix [Artifacts, Datasets, Models] successful deletion notification me…

…ssage (#2169)

src/utils/handleDeleteArtifact.js

@@ -17,6 +17,7 @@ illegal under applicable law, and the grant of the foregoing license
 under the Apache 2.0 license is conditioned upon your compliance with
 such restriction.
 */
+import { capitalize } from 'lodash'
 import { deleteArtifact } from '../reducers/artifactsReducer'
 import { setNotification } from '../reducers/notificationReducer'
 import { showErrorNotification } from './notifications.util'
@@ -39,7 +40,7 @@ export const handleDeleteArtifact = (
         setNotification({
           status: 200,
           id: Math.random(),
-          message: `${artifactType} is successfully deleted`
+          message: `${capitalize(artifactType)} is successfully deleted`
         })
       )
     })