Bump opentelemetry-instrumentation-aws-lambda

Bumps the otel-instrumentors group in /lambda/tests with 1 update: [opentelemetry-instrumentation-aws-lambda](https://github.com/open-telemetry/opentelemetry-python-contrib).


Updates `opentelemetry-instrumentation-aws-lambda` from 0.49b2 to 0.50b0
- [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-aws-lambda
  dependency-type: direct:production
  dependency-group: otel-instrumentors
...

Signed-off-by: dependabot[bot] <[email protected]>

lambda/tests/requirements.txt

@@ -1,2 +1,2 @@
-opentelemetry-instrumentation-aws-lambda == 0.49b2
+opentelemetry-instrumentation-aws-lambda == 0.50b0
 opentelemetry-propagator-aws-xray == 1.0.2