change the script [skip ci]

Signed-off-by: Gabriele Santomaggio <[email protected]>

create_tag.sh

@@ -2,7 +2,7 @@
 
 version=$1
 gpg_key=$2
-regex="^([0-9]+)\.([0-9]+)\.([0-9]+)(-(alpha|beta|rc)\.([0-9]+))?$"
+regex="^([0-9]+)\.([0-9]+)\.([0-9]+)(-(alpha|beta|rc)\.[0-9]+)?$"
 tag="v$version"
 
 if [ $# -lt 2 ]; then