fix: Add `repository not found` trouble shooting to README #227

Job	Run time
lint	27s
Prepare docker tag	4s
Build & publish Docker images (builder, action-release-builder-image)	2m 50s
Build & publish Docker images (app, action-release-image)	5m 6s
test-runs-on-container	25s
Mock a release (ubuntu-latest)	8s
Mock a release (windows-latest)	40s
Test current action (ubuntu-latest)	15s
Mock a release (macos-latest)	23s
Mock a release in a different working directory (ubuntu-latest)	10s
Test current action (windows-latest)	45s
Mock a release in a different working directory (windows-latest)	1m 9s
Test current action (macos-latest)	35s
Mock a release in a different working directory (macos-latest)	25s
	13m 22s

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