fix README.md

Author: magiclen

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "wait-service"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Magic Len <len@magiclen.org>"]
 edition = "2021"
 repository = "https://github.com/magiclen/wait-service"

README.md

@@ -32,7 +32,7 @@ ARGS:
 
 ## The Config File
 
-With the `--json` option, you can input one or more JSON files to import your TCP / UDS services. Each file needs to content a JSON array of objects.
+With the `--json` option, you can input one or more JSON files to import your TCP / UDS services. The content of each file needs to be a JSON array of objects.
 
 For a TCP service, the object format is