JSON test results reporter to Slack

Version updated for k-kirill-s/test-report-to-slack to version v0.3.0.

• This action is used across all versions by ? repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

• performed several rounds of enhancements and polishing of the initial tool version
• created base usage documentation
• tested on production project

• k-kirill-s
• GitHub Actions