Add checklist item for reminding porter about auditing experimental interfaces.

Author: nerrad

.github/release-initial-checklist.md

@@ -91,6 +91,7 @@ Additionally, make sure to differentiate between things in the testing notes tha
 
 This only needs to be done if this release is the last release of the feature plugin before code freeze in the WooCommerce core cycle. If this condition doesn't exist you can skip this section.
 
+* [ ] Remind whoever is porter this week to audit our codebase to ensure this [experimental interface document](https://github.com/woocommerce/woocommerce-gutenberg-products-block/blob/trunk/docs/blocks/feature-flags-and-experimental-interfaces.md) is up to date. See Pca54o-rM-p2 for more details.
 * [ ] Create a pull request for updating the package in the [WooCommerce Core Repository](https://github.com/woocommerce/woocommerce/) that [bumps the package version](https://github.com/woocommerce/woocommerce/blob/master/composer.json) for the blocks package to the version being pulled in.
   * The content for the pull release can follow [this example](https://github.com/woocommerce/woocommerce/pull/27676). Essentially you link to all the important things that have already been prepared. Note, you need to make sure you link to all the related documents for the feature plugin releases since the last package version bump in Woo Core.
       * Please add a changelog to the content which is aggregated from all the releases included in the package bump. The changelog should only list things surfaced to users of the package in WooCommerce core (i.e. excluding things only available in the feature plugin or development builds). This changelog will be used in the release notes for the WooCommerce release. **Note: This currently is not shown in the linked example.**