Update GraphDef version to 704.

PiperOrigin-RevId: 362673401
Change-Id: I7e5dac8fa29ad68ee343a0229b15e985d2d5c388
diff --git a/tensorflow/core/public/version.h b/tensorflow/core/public/version.h
index 41e2a47..fb96724 100644
--- a/tensorflow/core/public/version.h
+++ b/tensorflow/core/public/version.h
@@ -108,7 +108,7 @@
 
 #define TF_GRAPH_DEF_VERSION_MIN_PRODUCER 0
 #define TF_GRAPH_DEF_VERSION_MIN_CONSUMER 0
-#define TF_GRAPH_DEF_VERSION 703  // Updated: 2021/3/12
+#define TF_GRAPH_DEF_VERSION 704  // Updated: 2021/3/13
 
 // Checkpoint compatibility versions (the versions field in SavedSliceMeta).
 //