version upgrade should also happen for embedded demo charts

[Rdataflow]

Describe the bug
A clear and concise description of what the bug is. If it seems connected to some data problem (missing values, wrong parsing) please first check the cube in Cube Checker (int, prod) to see if everything is fine there.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://test.visualize.admin.ch/
2. Scroll down to demo charts
3. see version upgrade didn't happen
4. instead warning is displayed

Expected behavior
version upgrade like for all the embedded charts

Environment (please complete the following information):

• Visualize environment and version: v4.3.0 (1b6f09c)

Additional context
regression of #1473

[sosiology]

warning is not displayed anymore. Double checked on INT, TEST and PROD