fix: string formatting

[andreafortini]

Issue #4601

Add Python string format

Merge Checklist

• I have read the CONTRIBUTING doc and adhered to the example notebook best practices
• I have updated any necessary documentation, including READMEs
• I have tested my notebook(s) and ensured it runs end-to-end
• I have linted my notebook(s) and code using black-nb -l 100 {path}/{notebook-name}.ipynb

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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