message: [typo] Fix typo in language readme
  Fixing typo in language README
diff: @@ -30,7 +30,7 @@ Libra Core components interact with the language component through the VM. Speci
  * You can find many small Move IR examples in the [tests](https://github.com/libra/libra/tree/master/language/functional_tests/tests/testsuite). The easiest way to experiment with Move IR is to create a new test in this directory and follow the instructions for running the tests.
  * Some more substantial examples can be found in the [standard library](https://github.com/libra/libra/tree/master/language/stdlib/modules). The two most notable ones are [LibraAccount.mvir](https://github.com/libra/libra/blob/master/language/stdlib/modules/libra_account.mvir), which implements accounts on the Libra blockchain, and [LibraCoin.mvir](https://github.com/libra/libra/blob/master/language/stdlib/modules/libra_coin.mvir), which implements Libra coin.
  -* The four transaction scripts supported in the Libra testnet are also in the standard library directiory. They are [peer-to-peer transfer](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/peer_to_peer_transfer.mvir), [account creation](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/create_account.mvir), [minting new Libra](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/mint.mvir) (will only work for an account with proper privileges), and [key rotation](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/rotate_authentication_key.mvir).
  +* The four transaction scripts supported in the Libra testnet are also in the standard library directory. They are [peer-to-peer transfer](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/peer_to_peer_transfer.mvir), [account creation](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/create_account.mvir), [minting new Libra](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/mint.mvir) (will only work for an account with proper privileges), and [key rotation](https://github.com/libra/libra/blob/master/language/stdlib/transaction_scripts/rotate_authentication_key.mvir).
  * The most complete documentation of the Move IR syntax is the [grammar](https://github.com/libra/libra/blob/master/language/compiler/src/parser/mod.rs). You can also take a look at the [parser for the Move IR](https://github.com/libra/libra/blob/master/language/compiler/src/parser/syntax.lalrpop).
  * Check out the [IR compiler README](https://github.com/libra/libra/blob/master/language/compiler/README.md) for more details on writing Move IR code.
  