mark Iterator.prototype.includes as shipped in FF154

https://bugzilla.mozilla.org/show_bug.cgi?id=2034104

CHANGELOG.md

@@ -30,6 +30,7 @@
 - Slight performance improvement for engines with native `Array#fill` on `ArrayBuffer` constructor and `%TypedArray%#fill`
 - Clarify supported Node versions in `package.json` of some missed packages (just to satisfy `publint`)
 - Compat data improvements:
+  - [`Iterator.prototype.includes`](https://github.com/tc39/proposal-iterator-includes) marked as [shipped in FF154](https://bugzilla.mozilla.org/show_bug.cgi?id=2034104)
   - [`Array.prototype.includes` bug](https://bugs.webkit.org/show_bug.cgi?id=309342) marked as fixed in Bun 1.3.12
   - Added [Node 26.0](https://github.com/nodejs/node/pull/62526) compat data mapping
   - Added [Deno 2.7.8](https://github.com/denoland/deno/releases/tag/v2.7.8) and [Deno 2.8.0](https://github.com/denoland/deno/releases/tag/v2.8.0) compat data mapping

packages/core-js-compat/src/data.mjs

@@ -2633,6 +2633,7 @@ export const data = {
   // TODO: Remove from `core-js@4`
   'esnext.iterator.from': null,
   'esnext.iterator.includes': {
+    firefox: '154',
   },
   'esnext.iterator.indexed': {
   },