minor changes to release script (#1342)

Author: andygrove

dev/release/README.md

@@ -181,7 +181,7 @@ svn commit KEYS -m "Add key for John Doe"
 Run `create-tarball.sh` with the `<version>` tag and `<rc>` and you found in previous steps:
 
 ```shell
-GH_TOKEN=<TOKEN> ./dev/release/create-tarball.sh 0.11.0 1
+./dev/release/create-tarball.sh 0.11.0 1
 ```
 
 The `create-tarball.sh` script

dev/release/create-tarball.sh

@@ -75,7 +75,7 @@ echo ""
 echo "---------------------------------------------------------"
 cat <<MAIL
 To: [email protected]
-Subject: [VOTE][RUST][Ballista] Release Apache DataFusion Ballista ${version} RC${rc}
+Subject: [VOTE] Release Apache DataFusion Ballista ${version} RC${rc}
 Hi,
 
 I would like to propose a release of Apache DataFusion Ballista version ${version}.