refactor: original should be removed when session id changed (#5931)

#### What type of PR is this?
/kind improvement
/area core

#### What this PR does / why we need it:
当 session id 改变时清除原来的 session id 记录

#### Does this PR introduce a user-facing change?
```release-note
None
```

application/src/main/java/run/halo/app/security/session/InMemoryReactiveIndexedSessionRepository.java

@@ -98,6 +98,12 @@ public class InMemoryReactiveIndexedSessionRepository extends ReactiveMapSession
 
     Mono<Void> updateIndex(MapSession session) {
         return removeIndex(session.getId())
+            .then(Mono.defer(() -> {
+                if (!session.getId().equals(session.getOriginalId())) {
+                    return removeIndex(session.getOriginalId());
+                }
+                return Mono.empty();
+            }))
             .then(Mono.defer(() -> {
                 indexResolver.resolveIndexesFor(session)
                     .forEach((name, value) -> {