chore(deps): Bump opentelemetry-exporter-otlp-proto-http

Bumps the minor-and-patch group in /a2a/simple_generalist with 1 update: [opentelemetry-exporter-otlp-proto-http](https://github.com/open-telemetry/opentelemetry-python).


Updates `opentelemetry-exporter-otlp-proto-http` from 1.43.0 to 1.44.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-python/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-python/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-python@v1.43.0...v1.44.0)

---
updated-dependencies:
- dependency-name: opentelemetry-exporter-otlp-proto-http
  dependency-version: 1.44.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-and-patch
...

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

Author: dependabot[bot]

a2a/simple_generalist/pyproject.toml

@@ -11,7 +11,7 @@ dependencies = [
     "pydantic>=2.13.4",
     "pydantic-settings>=2.14.2",
     "uvicorn>=0.51.0",
-    "opentelemetry-exporter-otlp-proto-http>=1.43.0",
+    "opentelemetry-exporter-otlp-proto-http>=1.44.0",
     "urllib3>=2.7.0",            # Indirect; prevents CVE-2026-44431, CVE-2026-44432
     "python-multipart>=0.0.32",  # Indirect; prevents CVE-2026-24486
 ]