Remove GITHUB_ACCESS_TOKEN requirement from release notes script

[muraee]

What this PR does / why we need it:
GITHUB_ACCESS_TOKEN is not required, public repos are accessible without a token.

cleanup logs to allow for an automation to directly consume the output of the command.

Which issue(s) this PR fixes (optional, use fixes #<issue_number>(, fixes #<issue_number>, ...) format, where issue_number might be a GitHub issue, or a Jira story:
Fixes #

Checklist

• Subject and description added to both, commit and PR.
• Relevant issues have been referenced.
• This change includes docs.
• This change includes unit tests.

[Patryk-Stefanski]

can you update this line aswell -> https://github.com/openshift/hypershift/blob/main/docs/content/contribute/release-process.md?plain=1#L29 ?

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[Patryk-Stefanski]

/lgtm

[muraee]

/retest-required

[enxebre]

/approve

[bryan-cox]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bryan-cox, enxebre, muraee

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[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 41e3cf9 and 2 for PR HEAD 8349874 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD a70b9a5 and 1 for PR HEAD 8349874 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD eca17b6 and 0 for PR HEAD 8349874 in total

[openshift-ci-robot]

/hold

Revision 8349874 was retested 3 times: holding

[muraee]

/retest-required

[muraee]

/unhold

[openshift-ci]

@muraee: all tests passed!

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