Fix `OpenTelemetry.Tracer.end_span` return type spec #1425

	name: W3C Interop

	on:
	pull_request:
	branches:
	- 'main'
	push:
	branches:
	- 'main'

	jobs:
	interop_tests:
	name: Run W3C Trace Context Interop Tests
	runs-on: ubuntu-24.04
	steps:
	- uses: actions/checkout@v4
	- uses: erlef/setup-beam@v1
	with:
	otp-version: '26.1.2'
	version-type: strict
	rebar3-version: '3.22.1'
	- uses: actions/cache@v4
	name: Cache
	with:
	path: \|
	_build
	key: ${{ runner.os }}-build-${{ matrix.otp_version }}-${{ hashFiles(format('rebar.lock')) }}-1
	restore-keys: \|
	${{ runner.os }}-build-${{ matrix.otp_version }}-1-

	- name: Compile
	run: rebar3 as interop compile

	- uses: actions/checkout@v4
	with:
	repository: 'w3c/trace-context'
	path: 'trace-context'
	- name: Setup python
	uses: actions/setup-python@v5
	with:
	python-version: 3.12
	architecture: x64
	- run: pip install aiohttp
	- run: \|
	rebar3 as interop compile

	erl -noinput -pa ./_build/interop/extras/interop/ $(rebar3 as interop path) -s w3c_trace_context_interop &
	sleep 1
	cd trace-context/test
	STRICT_LEVEL=2 python3 test.py http://127.0.0.1:5000/test
	shell: bash

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