[FIX] website_event: fix a regex unsupported in Safari

Commit [1] added a regular expression that looks behind to ensure a `-`
is present without capturing it. Unfortunately, the Positive Look Behind
regex (?<=...) is unsupported by Safari as of now (16.1, see [2]).

This commit replaces the regex by removing the '-' after capturing it.

Steps to reproduce:
- Use Safari
- Install website_event
- Try to edit any page with website
- "Invalid group specifier name" error appears

[1]: https://github.com/odoo/odoo/commit/5f1f082dbe268522f8fc7e63ad5f564b25020a22
[2]: https://caniuse.com/js-regexp-lookbehind

opw-3049537
opw-3023128
opw-3023329

closes odoo/odoo#105076

X-original-commit: 08413daa7b62539f86110575f1835d6db271ea10
Signed-off-by: Romain Derie (rde) <rde@odoo.com>

addons/website_event/static/src/snippets/options.js

@@ -62,7 +62,7 @@ options.registry.WebsiteEvent = options.Class.extend({
      * @private
      */
     _getEventObjectId() {
-        const objectIds = this.currentWebsiteUrl.match(/(?<=-)\d+(?![-\w\d])/);
-        return parseInt(objectIds[0]) | 0;
+        const objectIds = this.currentWebsiteUrl.match(/-\d+(?![-\w\d])/);
+        return parseInt(objectIds[0].replace('-', '')) | 0;
     },
 });