fix(cynosdb): [120305083] Fix the problem of matching errors caused b… (#2912)

* fix(cynosdb): [120305083] Fix the problem of matching errors caused by fuzzy query

* fix: add changelog

Author: gitmkn

.changelog/2912.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+resource/tencentcloud_cynosdb_cluster_databases: Fix the problem of matching errors caused by fuzzy query.
+```

tencentcloud/services/cynosdb/service_tencentcloud_cynosdb.go

@@ -2232,7 +2232,12 @@ func (me *CynosdbService) DescribeCynosdbClusterDatabasesById(ctx context.Contex
 		return
 	}
 
-	clusterDatabases = response.Response.DbInfos[0]
+	for _, dbInfo := range response.Response.DbInfos {
+		if dbInfo != nil && dbInfo.DbName != nil && *dbInfo.DbName == dbName {
+			clusterDatabases = dbInfo
+			return
+		}
+	}
 
 	return
 }