Bugfix/openapi ensure url (#3183)

* added validations for spec and ref

* openapi import - cleanup url

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Co-authored-by: Anusree Subash <anusree@usebruno.com>

packages/bruno-app/src/utils/importers/openapi-collection.js

@@ -32,7 +32,7 @@ const readFile = (files) => {
 
 const ensureUrl = (url) => {
   // emoving multiple slashes after the protocol if it exists, or after the beginning of the string otherwise
-  return url.replace(/(^\w+:|^)\/{2,}/, '$1/');
+  return url.replace(/([^:])\/{2,}/g, '$1/');
 };
 
 const buildEmptyJsonBody = (bodySchema) => {