Doc: user must be in repository root to install commit-msg hook

Clarify in the documentation that the user must be in the root
directory of the local repository for installing the commit-msg hook.

Change-Id: I6e3a186c7d294dbdf0d6719f02f50b9b65027902
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
1 file changed