room header link추가

client/src/components/Room/RoomHeader.js

+import { Link } from "react-router-dom";
+
 const RoomHeader = () => {
   return (
     <div className="container">
@@ -25,19 +27,21 @@ const RoomHeader = () => {
           <p className="m-2" style={{ fontWeight: "bold", fontSize: "20px" }}>
             회의
           </p>
-          <button
-            type="button"
-            className="m-2 rounded"
-            style={{
-              height: "30px",
-              fontWeight: "bold",
-              backgroundColor: "#E8B7FF",
-              color: "black",
-              border: "1px #f4c1f2",
-            }}
-          >
-            돌아가기
-          </button>
+          <Link to="/user">
+            <button
+              type="button"
+              className="m-2 rounded"
+              style={{
+                height: "30px",
+                fontWeight: "bold",
+                backgroundColor: "#E8B7FF",
+                color: "black",
+                border: "1px #f4c1f2",
+              }}
+            >
+              돌아가기
+            </button>
+          </Link>
         </div>
       </div>
     </div>