Update docs/changelog/121667.yaml

Author: valeriy42

docs/changelog/121667.yaml

@@ -2,11 +2,12 @@ pr: 121667
 summary: Add deprecation warning for flush API
 area: Machine Learning
 type: deprecation
-issues: []
+issues:
+ - 121506
 deprecation:
   title: Add deprecation warning for flush API
   area: Machine Learning
-  details: The anomaly detection job flush API is deprecated since it is only required for the post data API,
-    which was deprecated since 7.11.0.
-  impact: This should have a minimal impact on users as the flush API is only required for the post data API,
-    which was deprecated since 7.11.0.
+  details: "The anomaly detection job flush API is deprecated since it is only required\
+    \ for the post data API, which was deprecated since 7.11.0."
+  impact: "This should have a minimal impact on users as the flush API is only required\
+    \ for the post data API, which was deprecated since 7.11.0."