Update web-features tags (#27721)

Author: mdn-bot

api/CustomElementRegistry.json

@@ -143,6 +143,9 @@
           "__compat": {
             "description": "`connectedMoveCallback()` lifecycle callback",
             "spec_url": "https://html.spec.whatwg.org/multipage/custom-elements.html#preserving-custom-element-state-when-moved",
+            "tags": [
+              "web-features:move-before"
+            ],
             "support": {
               "chrome": {
                 "version_added": "133"