minor sync text

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@50541 15284696-431f-4ddb-bdfa-cd5b030d7da7

debian/README.debian

@@ -21,7 +21,7 @@
 
 # In your favorite text editor open debian/changelog and adjust the
 # version number on the top line to reflect the GRASS SVN checkout number.
-# e.g. for r50538: grass (7.0+svn50539-0) unstable; urgency=low
+# e.g. for r50539: grass (7.0+svn50539-0) unstable; urgency=low
 
   nano debian/changelog