docs: Update version number used in README.md

[krewenki]

Description

Changes the package version used in the README.md examples to reflect the current release.

Motivation and Context

The documentation still used version 6.0, and while that will still work, this should help prevent people from following out of date examples.

Breaking Changes

How Has This Been Tested?

• [ ] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [ ] I have tested and validated these changes using one or more of the provided examples/* projects

• [x] I have executed pre-commit run -a on my pull request