Revert "chore(silverbullet): bump chart to 0.5.0 with app version 2.5.2"

This reverts commit 8ffde36.

Author: stone

charts/silverbullet/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: silverbullet
 description: A Helm chart for SilverBullet - a modern, self-contained note-taking and personal knowledge management system
 type: application
-version: 0.5.0
+version: 0.4.0
 appVersion: "2.5.2"
 home: https://silverbullet.md
 sources: