Update README for 4.4.4

We're using "4.4.3-4.4.4" instead of "4.4.3-4" per the last 2 commits.

This appears to be the only other place where the package needs to be
updated for 4.4.4.
Merge pull request #1 from rwong48/update-readme-for-4.4.4

Update README for 4.4.4