Bump opentelemetry-instrumentation-fastapi in /code/function

Bumps [opentelemetry-instrumentation-fastapi](https://github.com/open-telemetry/opentelemetry-python-contrib) from 0.39b0 to 0.40b0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-python-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-python-contrib/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-python-contrib/commits)

---
updated-dependencies:
- dependency-name: opentelemetry-instrumentation-fastapi
  dependency-type: direct:production
...

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

Author: dependabot[bot]

code/function/requirements.txt

@@ -7,5 +7,5 @@ azure-functions~=1.15.0
 fastapi~=0.101.0
 pydantic-settings~=2.0.2
 aiohttp~=3.8.5
-opentelemetry-instrumentation-fastapi==0.39b0
+opentelemetry-instrumentation-fastapi==0.40b0
 azure-monitor-opentelemetry-exporter==1.0.0b14