script/generate-versions: fix versions sort (#2294)

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

scripts/generate-versions.sh

@@ -34,7 +34,7 @@ get_version() {
   fi
 
   # Use higher version from new version and current version
-  v=$(printf '%s\n' "$v" "$cv" | sort -n -r | head -n1)
+  v=$(printf '%s\n' "$v" "$cv" | sort -V -r | head -n1)
 
   echo "$v"
 }