fix bug

https://github.com/syuilo/misskey/commit/48ea805999c6cb8e900aeaec6edaf68788bd51e0#commitcomment-48584326

src/server/api/endpoints/admin/server-info.ts

@@ -2,7 +2,7 @@ import * as os from 'os';
 import * as si from 'systeminformation';
 import { getConnection } from 'typeorm';
 import define from '../../define';
-import redis from '../../../../db/redis';
+import { redisClient } from '../../../../db/redis';
 
 export const meta = {
 	requireCredential: true as const,
@@ -115,7 +115,7 @@ export default define(meta, async () => {
 		os: os.platform(),
 		node: process.version,
 		psql: await getConnection().query('SHOW server_version').then(x => x[0].server_version),
-		redis: redis.server_info.redis_version,
+		redis: redisClient.server_info.redis_version,
 		cpu: {
 			model: os.cpus()[0].model,
 			cores: os.cpus().length