Update README.md

Author: host6

README.md

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 # Overview
-Pk-vcs-git is lightweight library for execute basic Git VCS operations (merge, branch create etc). It uses [pk-vcs-api](https://github.com/ProjectKaiser/pk-vcs-api) exposing IVCS implementation for Git repositories.
+Pk-vcs-git is lightweight library for execute basic Git VCS operations (merge, branch create etc). It uses [pk-vcs-api](https://github.com/ProjectKaiser/pk-vcs-api) exposing IVCS implementation for Git repositories and [JGit](https://eclipse.org/jgit/) as framework to work with Git repositories
 
 # Terms
 - Workspace Home