fix: add condition for prefixing parameter

Author: djankows

modules/swagger-models/src/main/java/io/swagger/v3/oas/models/parameters/Parameter.java

@@ -321,7 +321,10 @@ public Parameter content(Content content) {
     }
 
     public void set$ref(String $ref) {
-        if ($ref != null && ($ref.indexOf('.') == -1 && $ref.indexOf('/') == -1)) {
+        if ($ref != null &&
+                !$ref.startsWith("#/components/parameters/")
+                && $ref.indexOf('.') == -1
+                && $ref.indexOf('/') == -1) {
             $ref = "#/components/parameters/" + $ref;
         }
         this.$ref = $ref;