Remove another lingering Leash reference

Be consistent with the MIT Kerberos brand.

(cherry picked from commit 58122fec56a87ca7f88052f6b55f90b94ce1c386)

https://github.com/krb5/krb5/commit/e8198e467e3bfbdb2db2432c8bd3dc8eda2dcbfa
Author: Ben Kaduk <kaduk@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: e8198e467e3bfbdb2db2432c8bd3dc8eda2dcbfa
Branch: krb5-1.13
 src/windows/leashdll/lshfunc.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)