Mermaid diagrams appear broken in readme

[luisgc93]

It seems like there's an issue with some of the mermaid diagrams in the project's readme file.

On chrome (version 124.0.6367.208 arm64):

Unable to render rich display

Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.

For more information, see https://docs.github.com/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams#creating-mermaid-diagrams

On Firefox:

Unable to render rich display

(intermediate value)[0][0] is undefined

For more information, see https://docs.github.com/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams#creating-mermaid-diagrams

This error happens on the 1st diagram as well as the ones on these sections:
https://github.com/allaboutapps/integresql?tab=readme-ov-file#testrunner-creates-a-new-template-database
https://github.com/allaboutapps/integresql?tab=readme-ov-file#testrunner-reuses-an-existing-template-database