Update container images to latest versions
Upgraded Docker images in multiple deployment YAML files:
- Updated radicale image to 3.5.4.0 in dav.yaml
- Updated ntfy image to v2.12.0 in ntfy.yaml
- Updated vaultwarden/server image to 1.34.1-alpine in pwd.yaml
- Updated rclone image to 1.70 in webdav.yaml
These updates ensure the latest features and security patches are applied.