Add end of args delimiter to string function call

action.yml

@@ -22,7 +22,7 @@ runs:
 
         for pattern in (string split --no-empty -- " " $PATTERNS)
             set -l escaped (string escape --style=script --no-quoted -- $pattern)
-            set -l escaped (string replace -r -a '\\\([?*{}])' '$1' $escaped)
+            set -l escaped (string replace -r -a -- '\\\([?*{}])' '$1' $escaped)
 
             eval set -l files $escaped