chore(release): bump chart version to 4.0.0 (#217)

Bump Chart.yaml version to 4.0.0 (appVersion unchanged).

Co-authored-by: a-klos <28005881+a-klos@users.noreply.github.com>

Author: a-klos

infrastructure/rag/Chart.yaml

@@ -5,7 +5,7 @@ description: |
   form rag. rag is an application, where you can upload your own documents and
   ask question about their content and the rag will answer them.
 type: application
-version: 3.4.0
+version: 4.0.0
 appVersion: "v4.0.0"
 dependencies:
 - name: langfuse