Update CHANGELOG after marketplace release

For eng/ide/als-publish#14

Author: AnthonyLeonardoGracio

CHANGELOG.md

@@ -5,6 +5,8 @@ section below it for the last release. -->
 
 ## \<next>
 
+## 26.0.202504171
+
 * Various improvements and bug fixes related to the GNATcoverage integration
 * Fix the display of the `Ada & SPARK` status bar item when there is no project-related diagnostic
 * Better handling of Ada files that do not belong to the loaded project tree