Bump google.golang.org/grpc from 1.67.1 to 1.68.1 in /sdks

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] <[email protected]>

sdks/go.mod

@@ -21,6 +21,7 @@
 module github.com/apache/beam/sdks/v2
 
 go 1.21.0
+toolchain go1.22.5
 
 require (
 	cloud.google.com/go/bigquery v1.64.0
@@ -60,7 +61,7 @@ require (
 	golang.org/x/text v0.21.0
 	google.golang.org/api v0.210.0
 	google.golang.org/genproto v0.0.0-20241118233622-e639e219e697
-	google.golang.org/grpc v1.67.2
+	google.golang.org/grpc v1.68.1
 	google.golang.org/protobuf v1.35.2
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1

sdks/go.sum

@@ -1895,8 +1895,8 @@ google.golang.org/grpc v1.52.3/go.mod h1:pu6fVzoFb+NBYNAvQL08ic+lvB2IojljRYuun5v
 google.golang.org/grpc v1.53.0/go.mod h1:OnIrk0ipVdj4N5d9IUoFUx72/VlD7+jUsHwZgwSMQpw=
 google.golang.org/grpc v1.54.0/go.mod h1:PUSEXI6iWghWaB6lXM4knEgpJNu2qUcKfDtNci3EC2g=
 google.golang.org/grpc v1.56.3/go.mod h1:I9bI3vqKfayGqPUAwGdOSu7kt6oIJLixfffKrpXqQ9s=
-google.golang.org/grpc v1.67.2 h1:Lq11HW1nr5m4OYV+ZVy2BjOK78/zqnTx24vyDBP1JcQ=
-google.golang.org/grpc v1.67.2/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/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
 google.golang.org/grpc/stats/opentelemetry v0.0.0-20240907200651-3ffb98b2c93a h1:UIpYSuWdWHSzjwcAFRLjKcPXFZVVLXGEM23W+NWqipw=
 google.golang.org/grpc/stats/opentelemetry v0.0.0-20240907200651-3ffb98b2c93a/go.mod h1:9i1T9n4ZinTUZGgzENMi8MDDgbGC5mqTS75JAv6xN3A=