Fix comparison in release script

Author: oschwald

dev-bin/release.sh

@@ -21,7 +21,7 @@ version="${BASH_REMATCH[1]}"
 date="${BASH_REMATCH[2]}"
 notes="$(echo "${BASH_REMATCH[3]}" | sed -n -e '/^[0-9]\+\.[0-9]\+\.[0-9]\+/,$!p')"
 
-if [[ "$date" -ne  $(date +"%Y-%m-%d") ]]; then
+if [[ "$date" !=  $(date +"%Y-%m-%d") ]]; then
     echo "$date is not today!"
     exit 1
 fi