krb5 commit [krb5-1.18]: Fix typo in SPAKE modprinc example

https://github.com/krb5/krb5/commit/1132233154eda74ff43af42d66e8370e6fc40036
commit 1132233154eda74ff43af42d66e8370e6fc40036
Author: Daniel Albers <[email protected]>
Date:   Thu Apr 9 11:25:34 2020 +0200

    Fix typo in SPAKE modprinc example
    
    (cherry picked from commit 74550f3deabb268a00b43fe0ac7debde0e108938)
    
    ticket: 8896
    version_fixed: 1.18.1

 doc/admin/spake.rst |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/doc/admin/spake.rst b/doc/admin/spake.rst
index 8b9f471..001f929 100644
--- a/doc/admin/spake.rst
+++ b/doc/admin/spake.rst
@@ -27,7 +27,7 @@ KDC.  Simply setting it to ``edwards25519`` is recommended::
 Set the **+requires_preauth** and **-allow_svr** flags on client
 principal entries, as you would for any preauthentication mechanism::
 
-    kadmin: modprinc +requires_preauth -allow_srv PRINCNAME
+    kadmin: modprinc +requires_preauth -allow_svr PRINCNAME
 
 Clients which do not implement SPAKE preauthentication will fall back
 to encrypted timestamp.