chore: use cargo fetch for install

Author: linux-china

src/managers/cargo.rs

@@ -17,7 +17,7 @@ pub fn is_command_available() -> bool {
 
 pub fn get_task_command_map() -> HashMap<String, String> {
     let mut task_command_map = HashMap::new();
-    task_command_map.insert("install".to_string(), "cargo build".to_string());
+    task_command_map.insert("install".to_string(), "cargo fetch".to_string());
     task_command_map.insert("compile".to_string(), "cargo build".to_string());
     task_command_map.insert("build".to_string(), "cargo build".to_string());
     task_command_map.insert("release".to_string(), "cargo build --release".to_string());