Update README.md

README.md

@@ -19,7 +19,7 @@ Pre-built binary for Linux x86_64 is available at [Github releases](https://gith
 ```
 # Architecture
 
-- Manager: Centural instance on status and job management
+- Manager: Central instance for status and job management
 - Worker: Runs mirror jobs
 
 +------------+ +---+                  +---+