Fix the example in the documentation of `art::Flags`.

#art-doc

Test: n/a (comment-only change)
Bug: 214176785
Change-Id: I97583af5841b0d597706c820b172d6006a2a7033
diff --git a/libartbase/base/flags.h b/libartbase/base/flags.h
index fc568b2..4c38fba 100644
--- a/libartbase/base/flags.h
+++ b/libartbase/base/flags.h
@@ -236,8 +236,8 @@
 //
 //     Flag<int> WriteMetricsToLog{"my-feature-test.flag", 42, FlagType::kDeviceConfig};
 //
-// This creates a boolean flag that can be read through gFlags.WriteMetricsToLog(). The default
-// value is false. Note that the default value can be left unspecified, in which the value of the
+// This creates an integer flag that can be read through gFlags.WriteMetricsToLog(). The default
+// value is 42. Note that the default value can be left unspecified, in which case the value of the
 // type's default constructor will be used.
 //
 // The flag can be set through the following generated means: