Track support for regex unicodeSets flag (#20091)

* Track support for regex unicodeSets flag

* Add MDN docs URL

Co-authored-by: Florian Scholz <fs@florianscholz.com>

* Make JSON valid

---------

Co-authored-by: Florian Scholz <fs@florianscholz.com>

Author: atjn

javascript/builtins/RegExp.json

@@ -1387,6 +1387,46 @@
             }
           }
         },
+        "unicodeSets": {
+          "__compat": {
+            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicodeSets",
+            "spec_url": "https://tc39.es/ecma262/multipage/text-processing.html#sec-get-regexp.prototype.unicodesets",
+            "support": {
+              "chrome": {
+                "version_added": "112"
+              },
+              "chrome_android": "mirror",
+              "deno": {
+                "version_added": "1.32"
+              },
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "116"
+              },
+              "firefox_android": "mirror",
+              "ie": {
+                "version_added": false
+              },
+              "nodejs": {
+                "version_added": "20.0.0"
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": "17"
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror"
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
         "@@match": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/RegExp/@@match",