fix: equals and hash code for unstructured metadata (#7382)

#### What type of PR is this?
/kind bug
/area core
/milestone 2.20.x

#### What this PR does / why we need it:
修复 Unstructured Metadata 的 equals hashcode  排除 version，这可能是之前误操作提交的

ed50a0224d/api/src/main/java/run/halo/app/extension/Unstructured.java (L75)

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

```release-note
None
```

api/src/main/java/run/halo/app/extension/Unstructured.java

@@ -72,7 +72,7 @@ public class Unstructured implements Extension {
         return new UnstructuredMetadata();
     }
 
-    @EqualsAndHashCode(exclude = "tatersion")
+    @EqualsAndHashCode(exclude = "version")
     class UnstructuredMetadata implements MetadataOperator {
 
         @Override