chore(deps): bump opentelemetry-exporter-otlp from 0.28.1 to 0.29.0

Bumps [opentelemetry-exporter-otlp](https://github.com/open-telemetry/opentelemetry-ruby) from 0.28.1 to 0.29.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-ruby/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-ruby/blob/main/exporter/otlp/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-ruby@opentelemetry-exporter-otlp/v0.28.1...opentelemetry-exporter-otlp/v0.29.0)

---
updated-dependencies:
- dependency-name: opentelemetry-exporter-otlp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -88,10 +88,10 @@ GEM
     erubi (1.13.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
-    google-protobuf (4.27.2-x86_64-darwin)
+    google-protobuf (4.28.0-x86_64-darwin)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.27.2-x86_64-linux)
+    google-protobuf (4.28.0-x86_64-linux)
       bigdecimal
       rake (>= 13)
     googleapis-common-protos-types (1.15.0)
@@ -128,10 +128,10 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.7-x86_64-linux)
       racc (~> 1.4)
-    opentelemetry-api (1.3.0)
+    opentelemetry-api (1.4.0)
     opentelemetry-common (0.21.0)
       opentelemetry-api (~> 1.0)
-    opentelemetry-exporter-otlp (0.28.1)
+    opentelemetry-exporter-otlp (0.29.0)
       google-protobuf (>= 3.18)
       googleapis-common-protos-types (~> 1.3)
       opentelemetry-api (~> 1.1)