fix build doc

Author: puredanger

BUILD.md

@@ -22,10 +22,10 @@ https://aws.amazon.com/cli/).
 The deploy script runs the package script, and then deploys the
 artifacts to the S3 bucket "mrel".  To deploy:
 
-    build/deploy
+    build/release
 
 ### Docs
 
 To build and deploy api documentation:
 
-    build/doc
+    build/doc