[fix/github-action-tx-config] GitHub Action: using tx config

[hosy]

Description

stay in root folder to automatically use the .tx/config

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• Added an issue with details about all relevant changes in the iOS documentation repository.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• Added changelog files for the fixed issues in folder changelog/unreleased

[TheOneRing]

The first approach worked.
The second one doesn't the -c has to go directly after tx.
As mentioned in the other reviews, please use the long argument: --config
BTW: The docker image can be tested locally.