add entry to bootstrap change tracker for new option rust.rustflags

Author: karolzwolak

src/bootstrap/src/utils/change_tracker.rs

@@ -576,4 +576,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "`llvm.enzyme` now works with `download-ci-llvm=true`.",
     },
+    ChangeInfo {
+        change_id: 148795,
+        severity: ChangeSeverity::Info,
+        summary: "New option `rust.rustflags` that will pass specified flags to rustc for all stages and targets`.",
+    },
 ];