rebase: bump google.golang.org/grpc from 1.69.4 to 1.70.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.69.4 to 1.70.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.69.4...v1.70.0)

---
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>

vendor/go.opentelemetry.io/otel/CONTRIBUTING.md

@@ -629,6 +629,10 @@ should be canceled.
 
 ## Approvers and Maintainers
 
+### Triagers
+
+- [Cheng-Zhen Yang](https://github.com/scorpionknifes), Independent
+
 ### Approvers
 
 ### Maintainers
@@ -641,13 +645,13 @@ should be canceled.
 
 ### Emeritus
 
-- [Aaron Clawson](https://github.com/MadVikingGod), LightStep
-- [Anthony Mirabella](https://github.com/Aneurysm9), AWS
-- [Chester Cheung](https://github.com/hanyuancheung), Tencent
-- [Evan Torrie](https://github.com/evantorrie), Yahoo
-- [Gustavo Silva Paiva](https://github.com/paivagustavo), LightStep
-- [Josh MacDonald](https://github.com/jmacd), LightStep
-- [Liz Fong-Jones](https://github.com/lizthegrey), Honeycomb
+- [Aaron Clawson](https://github.com/MadVikingGod)
+- [Anthony Mirabella](https://github.com/Aneurysm9)
+- [Chester Cheung](https://github.com/hanyuancheung)
+- [Evan Torrie](https://github.com/evantorrie)
+- [Gustavo Silva Paiva](https://github.com/paivagustavo)
+- [Josh MacDonald](https://github.com/jmacd)
+- [Liz Fong-Jones](https://github.com/lizthegrey)
 
 ### Become an Approver or a Maintainer