config(params): 更新侧边栏头像配置

Author: xieyuen

config/_default/params.toml

@@ -20,7 +20,7 @@ SortBy              = "default"
 [sidebar]
     emoji    = "🍥"
     subtitle = "数学研究无止境"
-    avatar   = "img/avatar.png"
+    avatar   = "img/hz.png"
 
 [article]
     headingAnchor = false