Update README.md

Author: yanglbme

solution/1800-1899/1823.Find the Winner of the Circular Game/README.md

@@ -149,6 +149,20 @@ function findTheWinner(n: number, k: number): number {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn find_the_winner(n: i32, k: i32) -> i32 {
+        if n == 1 {
+            return 1;
+        }
+        let mut ans = (k + Solution::find_the_winner(n - 1, k)) % n;
+        return if ans == 0 { n } else { ans };
+    }
+}
+```
+
 #### JavaScript
 
 ```js