[monitoring-plugins] doc/RELEASING.md: Fix a typo

[Holger Weiss]

 Module: monitoring-plugins
 Branch: master
 Commit: 6ce3d650cb016155a4f1dd95ffe7bd7c744d5d89
 Author: Holger Weiss <holger at zedat.fu-berlin.de>
   Date: Tue Nov 29 09:08:07 2016 +0100
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=6ce3d65

doc/RELEASING.md: Fix a typo

---

 doc/RELEASING.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/RELEASING.md b/doc/RELEASING.md
index 7758e0b..dd55744 100644
--- a/doc/RELEASING.md
+++ b/doc/RELEASING.md
@@ -65,8 +65,8 @@ Upload tarball to web site
     scp monitoring-plugins-2.3.tar.gz \
         plugins at orwell.monitoring-plugins.org:web/download/
 
-Generate SHA1 checksum files on web site
-----------------------------------------
+Generate SHA1 checksum file on web site
+---------------------------------------
 
     ssh plugins at orwell.monitoring-plugins.org \
         '(cd web/download; $HOME/bin/create-checksum monitoring-plugins-2.3.tar.gz)'