Add release date

Author: MarkvanMents

content/en/docs/releasenotes/studio-pro/9/9.24.md

@@ -12,7 +12,7 @@ This is the [LTS](/releasenotes/studio-pro/lts-mts/#lts) version 9 release for a
 
 ## 9.24.8 {#9248}
 
-**Release date: September __, 2023**
+**Release date: September 15, 2023**
 
 {{% button color="info" href="https://marketplace.mendix.com/link/studiopro/9.24.8" text="Go to Marketplace" title="Download version 9.24.8 from the Marketplace" %}}