Added releaseName to error returned on gh failure (#119)

Signed-off-by: garethahealy <garethahealy@gmail.com>

pkg/releaser/releaser.go

@@ -337,7 +337,7 @@ func (r *Releaser) CreateReleases() error {
 			}
 		}
 		if err := r.github.CreateRelease(context.TODO(), release); err != nil {
-			return errors.Wrap(err, "error creating GitHub release")
+			return errors.Wrapf(err, "error creating GitHub release %s", releaseName)
 		}
 	}