feat: update Flipt v1 chart to release v1.60.0 (#240)

Co-authored-by: flipt-bot <dev@flipt.io>

Author: flipt-release-bot[bot]

charts/flipt/Chart.yaml

@@ -3,8 +3,8 @@ name: flipt
 home: https://flipt.io
 description: Flipt is an open-source, self-hosted feature flag solution.
 type: application
-version: 0.85.5
-appVersion: v1.59.3
+version: 0.86.0
+appVersion: v1.60.0
 maintainers:
   - name: Flipt
     url: https://github.com/flipt-io/helm-charts