Updated chart to release v0.4.21 (#169)

Co-authored-by: michaeljguarino <michaeljguarino@users.noreply.github.com>

Author: github-actions[bot]

charts/deployment-operator/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
 name: deployment-operator
 description: creates a new instance of the plural deployment operator
-appVersion: 0.4.20
-version: 0.4.20
+appVersion: 0.4.21
+version: 0.4.21
 maintainers:
   - name: Plural
     url: https://www.plural.sh