Update Helm release application to v2.20.0 (#348)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Chart.yaml

@@ -6,4 +6,4 @@ dependencies:
   - name: application
     repository: https://camptocamp.github.io/helm-application/
     alias: geoserver
-    version: 2.19.0
+    version: 2.20.1