refactor(utils): 修改获取用户ID方法的名称

- 将 getUserId 方法重命名为 getMemberId

src/main/java/com/xynet/marketing/utils/MemberAuthUtils.java

@@ -14,7 +14,7 @@ import java.util.Map;
 public class MemberAuthUtils {
     private static String redisPrefix = "userSession-";
 
-    public static String getUserId(Map<String, String> headers) {
+    public static String getMemberId(Map<String, String> headers) {
         //获取token
         String token = headers.get("token");
         String providerId = headers.get("provider_id");