[renovate] Update module golang.org/x/sync to v0.8.0

This MR contains the following updates:

Package	Type	Update	Change
golang.org/x/sync	require	minor	v0.7.0 -> v0.8.0

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go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/stretchr/testify v1.9.0
 	go.mongodb.org/mongo-driver v1.16.0
-	golang.org/x/sync v0.7.0
+	golang.org/x/sync v0.8.0
 	google.golang.org/grpc v1.65.0
 	google.golang.org/protobuf v1.34.2
 	gopkg.in/yaml.v3 v3.0.1