clarify message in case of simulation file not found #14

	# This is a basic workflow to help you get started with Actions

	name: main branch - Pytest on push and on pull requests

	# Controls when the workflow will run
	on:
	# Triggers the workflow on push or pull request events but only for the main branch
	push:
	branches: [ main]
	pull_request:
	branches: [ main ]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	pytest-main:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v2

	- name: check linting using pycodestyle
	run: \|
	pip install pycodestyle
	pip install pytest
	pycodestyle $(git ls-files '*.py')

	pip install ruff
	ruff check $(git ls-files '*.py')

	- name: install pygeckocircuits2 package
	run: \|
	pip install -e .

Provide feedback