perf: refine display name of system default role (#3280)

#### What type of PR is this?

/kind improvement

#### What this PR does / why we need it:

为系统初始化的角色添加显示名称

#### Which issue(s) this PR fixes:


Fixes #3257

#### Screenshots:

<img width="1668" alt="image" src="https://user-images.githubusercontent.com/21301288/218020794-696420c4-69bb-4422-9409-482bb2aff708.png">


#### Special notes for your reviewer:

see 

#### Does this PR introduce a user-facing change?

```release-note
为系统初始化的角色添加显示名称
```

src/main/resources/extensions/system-default-role.yaml

@@ -4,6 +4,8 @@ metadata:
   name: guest
   labels:
     rbac.authorization.halo.run/system-reserved: "true"
+  annotations:
+    rbac.authorization.halo.run/display-name: "访客"
 rules: [ ]
 
 ---
@@ -14,6 +16,7 @@ metadata:
   labels:
     rbac.authorization.halo.run/system-reserved: "true"
   annotations:
+    rbac.authorization.halo.run/display-name: "超级管理员"
     rbac.authorization.halo.run/ui-permissions: |
       ["*"]
 rules: