fix typo in ch. 5, sec. Contributing

Author: akromkhasani

book/05-distributed-git/sections/contributing.asc

@@ -554,7 +554,7 @@ Jessica Smith (2):
  1 files changed, 9 insertions(+), 1 deletions(-)
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-The output can be sent to the maintainer–it tells them where the work was branched from, summarizes the commits, and tells where to pull this work from.
+The output can be sent to the maintainer – it tells them where the work was branched from, summarizes the commits, and tells where to pull this work from.
 
 On a project for which you're not the maintainer, it's generally easier to have a branch like `master` always track `origin/master` and to do your work in topic branches that you can easily discard if they're rejected.
 Having work themes isolated into topic branches also makes it easier for you to rebase your work if the tip of the main repository has moved in the meantime and your commits no longer apply cleanly.