doc: Update screenshot of pull request quality overview IO-53

[prcr]

Updates the screenshot of the coverage metrics on the pull request quality overview area to take into account decimal values.

This screenshot is used on the following pages:

• https://feat-decimal-coverage-commits-prs-i--docs-codacy.netlify.app/coverage-reporter/#validating-coverage
• https://feat-decimal-coverage-commits-prs-i--docs-codacy.netlify.app/faq/general/how-do-i-block-merging-prs-using-codacy-as-a-quality-gate/#adding-coverage