Updated links to pchain-compile release page

Author: syrettaman

docs/smart_contract_sdk/build_contract.md

@@ -27,5 +27,5 @@ The WASM binary generated from a generic cargo build process has the following d
 ## Downloading **pchain_compile**
 ---
 
-`pchain_compile` supports Linux, macOS and Windows. Depending on the operating system, they can be downloaded from Assets of ParallelChain Lab's Git Hub [release page](https://github.com/parallelchain-io/pchain-compile).
+`pchain_compile` supports Linux, macOS and Windows. Depending on the operating system, they can be downloaded from Assets of ParallelChain Lab's Git Hub [release page](https://github.com/parallelchain-io/pchain-compile/releases/tag/v0.4.0).
 

docs/smart_contract_sdk/call_contract.md

@@ -9,7 +9,7 @@ tags:
 ## Preparing Contract Method Arguments
 ---
 
-Suppose you already deployed a contract that contains a `call` method as follows:
+Suppose you have already deployed a contract that contains a `call` method as follows:
 
 ```rust
     #[call]