chore(deps): update opentelemetry-api requirement

Updates the requirements on [opentelemetry-api](https://github.com/open-telemetry/opentelemetry-python) to permit the latest version.
- [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@v1.39.0...v1.40.0)

---
updated-dependencies:
- dependency-name: opentelemetry-api
  dependency-version: 1.40.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

setup.cfg

@@ -25,7 +25,7 @@ packages=find_namespace:
 zip_safe = False
 include_package_data = True
 install_requires =
-    opentelemetry-api~=1.39.0
+    opentelemetry-api~=1.40.0
     opentelemetry-sdk~=1.39.0
     opentelemetry-exporter-otlp~=1.39.0
     opentelemetry-instrumentation~=0.60b1