backup: bump FlushAll minimum version to 2.6.11 (#942)

Signed-off-by: huanghaoyuanhhy <haoyuan.huang@zilliz.com>

Author: huanghaoyuanhhy

internal/client/milvus/grpc.go

@@ -61,7 +61,7 @@ var _featureTuples = []featureTuple{
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.4.3-0")), Flag: DescribeDatabase},
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.6.5-0")), Flag: MultiL0InOneJob},
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.5.8-0")), Flag: GetSegmentInfo},
-	{Constraints: lo.Must(semver.NewConstraint(">= 2.6.9-0")), Flag: FlushAll},
+	{Constraints: lo.Must(semver.NewConstraint(">= 2.6.11-0")), Flag: FlushAll},
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.6.8-0")), Flag: CollectionLevelGCControl},
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.4.0-0")), Flag: GetReplicas},
 	{Constraints: lo.Must(semver.NewConstraint(">= 2.6.8-0")), Flag: FuncRuntimeCheck},