Update Freedesktop SDK to version 25.08.6

Author: Update Checker

elements/freedesktop-sdk.bst

@@ -11,7 +11,7 @@ sources:
   # - Common plugins in elements/plugins
   track: release/25.08
   track-tags: True
-  ref: freedesktop-sdk-25.08.5-0-g95585daebf5a424bb5bcb260868c3245624a37e8
+  ref: freedesktop-sdk-25.08.6-0-g969f986893cc354ae714ec8c460f693e29ea97b0
 
 config:
   options: