Match release-update-repos.yml to v7

[moleske]

• spaces and environment variable setting consistency

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Where this PR should be backported?

• main - all changes should by default start here
• v8
• v7

Description of the Change

Make release-update-repos.yml match the v7 branch

Why Is This PR Valuable?

Consistency across branches on release logic

Applicable Issues

List any applicable GitHub Issues here

How Urgent Is The Change?

Is the change urgent? If so, explain why it is time-sensitive.

Other Relevant Parties

Who else is affected by the change?