Fix the deprecation warning of support for convention-base @Component names (#7433)

#### What type of PR is this?

/kind improvement

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

过期的Spring @Component API

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

Fixes #7431

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

```release-note
None
```

api/src/main/java/run/halo/app/theme/finders/Finder.java

@@ -4,6 +4,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.springframework.core.annotation.AliasFor;
 import org.springframework.stereotype.Service;
 
 /**
@@ -22,5 +23,6 @@ public @interface Finder {
      *
      * @return variable name, class simple name if not specified
      */
+    @AliasFor(annotation = Service.class)
     String value() default "";
 }