chore: update docker-compose-try-it.yaml and Helm chart to v1.0.0-rc.4

- Updated devguard image to v1.0.0-rc.4
- Updated devguard-web image to v1.0.0-rc.4
- Updated devguard-postgresql image to v1.0.0-rc.4
- Updated Helm chart appVersion to v1.0.0-rc.4

Author: timbastin

Chart.yaml

@@ -20,4 +20,4 @@ version: 0.19.2
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: v1.0.0-rc.1
+appVersion: v1.0.0-rc.4