[MM-18033] Upgrade minio-go dependency (#12046)

* Upgrade minio-go dependency

* Update go.mod and go.sum

services/filesstore/s3store.go

@@ -12,9 +12,9 @@ import (
 	"path/filepath"
 	"strings"
 
-	s3 "github.com/minio/minio-go"
-	"github.com/minio/minio-go/pkg/credentials"
-	"github.com/minio/minio-go/pkg/encrypt"
+	s3 "github.com/minio/minio-go/v6"
+	"github.com/minio/minio-go/v6/pkg/credentials"
+	"github.com/minio/minio-go/v6/pkg/encrypt"
 
 	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"