feat(firefox-beta): roll to r1419 (#24165)

Fixes https://github.com/microsoft/playwright/issues/24081

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

packages/playwright-core/browsers.json

@@ -27,9 +27,9 @@
     },
     {
       "name": "firefox-beta",
-      "revision": "1418",
+      "revision": "1419",
       "installByDefault": false,
-      "browserVersion": "115.0b8"
+      "browserVersion": "116.0b2"
     },
     {
       "name": "webkit",