Update CONTRIBUTING.md

Fix typo in CONTRIBUTING.md

Author: aaltat

CONTRIBUTING.md

@@ -100,7 +100,7 @@ and Node components.
 inv version $VERSION
 inv build
 git add Browser/version.py package.json package-lock.json setup.py docker/Dockerfile.latest_release
-git commit -m "Updateversion to: $VERSION"
+git commit -m "Update version to: $VERSION"
 git push
 ```