build(deps): bump google.golang.org/grpc from 1.67.1 to 1.68.1

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.67.1 to 1.68.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.67.1...v1.68.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -43,7 +43,7 @@ require (
 	golang.org/x/sync v0.9.0
 	golang.org/x/sys v0.27.0
 	golang.org/x/text v0.20.0
-	google.golang.org/grpc v1.67.1
+	google.golang.org/grpc v1.68.1
 	google.golang.org/protobuf v1.35.2
 	k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 // @grafana/grafana-app-platform-squad
 )

go.sum

@@ -305,8 +305,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28 h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:dguCy7UOdZhTvLzDyt15+rOrawrpM4q7DD9dQ1P11P4=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28 h1:XVhgTWWV3kGQlwJHR3upFWZeTsei6Oks1apkZSeonIE=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
-google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
-google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
+google.golang.org/grpc v1.68.1 h1:oI5oTa11+ng8r8XMMN7jAOmWfPZWbYpCFaMUTACxkM0=
+google.golang.org/grpc v1.68.1/go.mod h1:+q1XYFJjShcqn0QZHvCyeR4CXPA+llXIeUIfIe00waw=
 google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
 google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=