bootstrap: add change tracker entry for new --extra-checks=auto: feature

Author: lolbinarycat

src/bootstrap/src/utils/change_tracker.rs

@@ -451,4 +451,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Warning,
         summary: "The `spellcheck:fix` tidy extra check argument has been removed, use `--bless` instead",
     },
+    ChangeInfo {
+        change_id: 143398,
+        severity: ChangeSeverity::Info,
+        summary: "The --extra-checks flag now supports prefixing any check with `auto:` to only run it if relevant files are modified",
+    },
 ];