Finalize release notes content

Author: captainbrosset

microsoft-edge/web-platform/release-notes/134.md

@@ -40,6 +40,8 @@ To stay up-to-date and get the latest web platform features, download an Insider
     * [Web App `LocalFolder` Access](#web-app-localfolder-access)
     * [HTML+IDL handwriting attribute](#htmlidl-handwriting-attribute)
     * [Acquisition Info API](#acquisition-info-api)
+  * [New Chromium origin trials](#new-chromium-origin-trials)
+    * [SelectParserRelaxation](#selectparserrelaxation)
 
 
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@@ -270,6 +272,22 @@ Supports 3P acquisition attribution for Progressive Web Apps (PWAs) that were ac
 * [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
 
 
+<!-- ---------- -->
+#### Chromium origin trials
+
+
+<!-- ---------- -->
+###### SelectParserRelaxation
+
+Expires on November 11, 2025.
+
+This is a deprecation origin trial, which re-enables the old parser behavior for parsing `<select>` tags. Under that old behavior, non-supported content is silently discarded and not included in the DOM content underneath the `<select>`. This trial can be used in case the new behavior described in [Customizable `<select>` element](#customizable-select-element) breaks a site.
+
+* [Explainer](https://chromestatus.com/feature/5145948356083712)
+* [Feedback](https://crbug.com/new)
+* [Register](https://developer.chrome.com/origintrials/#/register_trial/182958734861926401)
+
+
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 > [!NOTE]
 > Portions of this page are modifications based on work created and shared by Chromium.org and used according to terms described in the [Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0).