docs: Modified one punctuation mark
issue
@@ -144,7 +144,7 @@ This interface is used to check whether the given private key is valid. The cont
#### Transaction Interface
##### Transaction Data Structure and Function Realization List
-A transaction is a signed message, transmitted through the blockchain network, and recorded on the blockchain. The functions of transaction interfaces provided by different blockchains are basically the same.
+A transaction is a signed message, transmitted through the blockchain network and recorded on the blockchain. The functions of transaction interfaces provided by different blockchains are basically the same.
For Ethereum/PlatON/PlatONE/FISCO BCOS:
