🐛 Fix release-notes in Makefile

[peppi-lotta]

What this PR does / why we need it: Fix the path release binary is created in. Add more logging and documentation to reduce user error when using release-notes action from Makefile.

[mquhuy]

/lgtm

[tuminoid]

I'll take a look tomorrow

[mquhuy]

/cc @adilGhaffarDev @kashifest

[tuminoid]

/override metal3-centos-e2e-integration-test-main metal3-ubuntu-e2e-integration-test-main

[metal3-io-bot]

@tuminoid: Overrode contexts on behalf of tuminoid: metal3-centos-e2e-integration-test-main, metal3-ubuntu-e2e-integration-test-main

In response to this:

/override metal3-centos-e2e-integration-test-main metal3-ubuntu-e2e-integration-test-main

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[tuminoid]

/approve

Manually tested, it works as expected.

[metal3-io-bot]

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[adilGhaffarDev]

/lgtm