Update README_EN.md

Author: sarvex

solution/0000-0099/0054.Spiral Matrix/README_EN.md

@@ -350,6 +350,46 @@ func spiralOrder(matrix [][]int) (ans []int) {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn spiral_order(matrix: Vec<Vec<i32>>) -> Vec<i32> {
+        let mut x1 = 0;
+        let mut y1 = 0;
+        let mut x2 = matrix.len() - 1;
+        let mut y2 = matrix[0].len() - 1;
+        let mut result = vec![];
+
+        while x1 <= x2 && y1 <= y2 {
+            for j in y1..=y2 {
+                result.push(matrix[x1][j]);
+            }
+            for i in x1 + 1..=x2 {
+                result.push(matrix[i][y2]);
+            }
+            if x1 < x2 && y1 < y2 {
+                for j in (y1..y2).rev() {
+                    result.push(matrix[x2][j]);
+                }
+                for i in (x1 + 1..x2).rev() {
+                    result.push(matrix[i][y1]);
+                }
+            }
+            x1 += 1;
+            y1 += 1;
+            if x2 != 0 {
+                x2 -= 1;
+            }
+            if y2 != 0 {
+                y2 -= 1;
+            }
+        }
+        return result;
+    }
+}
+```
+
 ### **JavaScript**
 
 ```js