Fix typo

README.md

@@ -31,7 +31,7 @@ fn main() {
 ```rust,ignore
 // In lib.rs or main.rs
 
-// Include the generated-file as a seperate module
+// Include the generated-file as a separate module
 pub mod built_info {
     include!(concat!(env!("OUT_DIR"), "/built.rs"));
 }