docs: Fix `IMAGE_NAME` var name for the Nth artifact

[vpnachev]

Fixes: # Related: Relevant tracking issues, for context Merge before/after: Dependent or prerequisite PRs

Description

Fix IMAGE_NAME var name for the Nth artifact. Also wraps N in angle brackets.

User facing changes (remove if N/A)

Follow-up Work (remove if N/A)

[conventional-commit-lint-gcf[bot]]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot https://conventionalcommits.org/