⚡ fix example usage in readme

README.md

@@ -74,7 +74,7 @@ use injrs::inject_windows::*;
 fn main() {
     let name = "Calc.exe";
     let dll = "./my-demo-dll.dll";
-    let p = Process::find_first_by_name(name).unwrap();
+    let process = Process::find_first_by_name(name).unwrap();
 
     print!("inject dll to process => ");
     match process.inject(dll) {
@@ -88,4 +88,4 @@ fn main() {
 }
 ```
 
-for more detail you can check [src/main.rs](./src/main.rs).
+for more detail you can check [src/main.rs](./src/main.rs).