Update README.md (Sourcery refactored)

[sourcery-ai]

Pull Request #2 refactored by Sourcery.

If you're happy with these changes, merge this Pull Request using the Squash and merge strategy.

NOTE: As code is pushed to the original Pull Request, Sourcery will
re-run and update (force-push) this Pull Request with new refactorings as
necessary. If Sourcery finds no refactorings at any point, this Pull Request
will be closed automatically.

See our documentation here.

Run Sourcery locally

Reduce the feedback loop during development by using the Sourcery editor plugin:

• VS Code
• PyCharm

Review changes via command line

To manually merge these changes, make sure you're on the robkam-update-name branch, then run:

git fetch origin sourcery/robkam-update-name
git merge --ff-only FETCH_HEAD
git reset HEAD^

Help us improve this pull request!

[sourcery-ai]

Function file_md5 refactored with the following changes:

• Use named expression to simplify assignment and conditional (use-named-expression)
• Lift code into else after jump in control flow (reintroduce-else)
• Swap if/else branches (swap-if-else-branches)