Add changeinfo

Author: jieyouxu

src/bootstrap/src/utils/change_tracker.rs

@@ -300,4 +300,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "`download-rustc='if-unchanged'` is now a default option for library profile.",
     },
+    ChangeInfo {
+        change_id: 133068,
+        severity: ChangeSeverity::Info,
+        summary: "Reverted `download-rustc` defaults; global default is now `false`, and only `'if-unchanged'` for tools profile.",
+    },
 ];