Safari 26.2 supports request-close (mdn#28659)

* Safari supports request-close

* Fixes

* Add MDN lint

Author: tunetheweb

api/HTMLButtonElement.json

@@ -148,7 +148,7 @@
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "preview"
+                "version_added": "26.2"
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",

html/elements/button.json

@@ -98,7 +98,7 @@
                 "opera": "mirror",
                 "opera_android": "mirror",
                 "safari": {
-                  "version_added": "preview"
+                  "version_added": "26.2"
                 },
                 "safari_ios": "mirror",
                 "samsunginternet_android": "mirror",