chore: 统一 POM 的 name 与 artifactId，并补充 description

sa-token-demo/sa-token-demo-springboot4-redis/src/main/java/com/pj/test/FaviconController.java

@@ -0,0 +1,15 @@
+package com.pj.test;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class FaviconController {
+
+    @RequestMapping("/favicon.ico")
+    public String favicon() {
+        return "";
+    }
+
+}
+