[renovate] Update module google.golang.org/grpc to v1.68.0

This MR contains the following updates:

Package	Type	Update	Change
google.golang.org/grpc	require	minor	v1.67.1 -> v1.68.0

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go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/stretchr/testify v1.9.0
 	golang.org/x/sys v0.27.0
 	google.golang.org/genproto/googleapis/api v0.0.0-20240903143218-8af14fe29dc1
-	google.golang.org/grpc v1.67.1
+	google.golang.org/grpc v1.68.0
 	google.golang.org/protobuf v1.35.2
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -37,7 +37,7 @@ require (
 	github.com/tklauser/numcpus v0.7.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 // indirect
-	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/text v0.17.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240827150818-7e3bb234dfed // indirect
+	golang.org/x/net v0.29.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 // indirect
 )