Bump released version in changelog

For eng/ide/als-publish#13

Author: eliericha

CHANGELOG.md

@@ -5,6 +5,8 @@ section below it for the last release. -->
 
 ## \<next>
 
+## 26.0.202504012
+
 * Fix a bug that caused the ALS to hang when trying to complete partially qualified invisible symbols
 * Support loading a fresh checkout of an Alire crate by automatically performing the necessary Alire workspace initializations
 * VS Code status bar now displays an item showing the project-loading status and useful commands provided by the extension when hovering on it