update change tracking with warning on removal of fields.

Author: Shourya742

src/bootstrap/src/utils/change_tracker.rs

@@ -471,4 +471,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "A --compile-time-deps flag has been added to reduce the time it takes rust-analyzer to start",
     },
+    ChangeInfo {
+        change_id: 143926,
+        severity: ChangeSeverity::Warning,
+        summary: "Removed `rust.description` and `llvm.ccache` as it was deprecated in #137723 and #136941 long time ago.",
+    },
 ];