Update README.md

README.md

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 Official docker images of kamailio project.
 
-This repository is a source to build "official" docker images on hub.docker.com automatically. Most changes happens in the respective version branches. The master is just the base for this branches.
+This repository is a source to build "official" docker images on hub.docker.com automatically. Most changes happens in the respective version branches. The master is just the base for these branches.