Fix dex2oat return code logged by artd.

Bug: 229268202
Test: Presubmit
Ignore-AOSP-First: ART Services.
Change-Id: Ic51f2dc939a9ecd099f9300d11e62b8c4cd76cfa
diff --git a/artd/artd.cc b/artd/artd.cc
index d7ef992..15ef58b 100644
--- a/artd/artd.cc
+++ b/artd/artd.cc
@@ -882,7 +882,7 @@
   LOG(INFO) << "dex2oat returned code {}"_format(result.value());
 
   if (result.value() != 0) {
-    return NonFatal("dex2oat returned an unexpected code: %d"_format(result.value()));
+    return NonFatal("dex2oat returned an unexpected code: {}"_format(result.value()));
   }
 
   int64_t size_bytes = 0;