fix(ci): resolve issue with table rendering

[universal-itengineer]

Description

Fix table rendering in the Nightly End-to-End tests report.

Why do we need it, and what problem does it solve?

What is the expected result?

The table in the nightly report should be rendered correctly.

Checklist

• The code is covered by unit tests.
• e2e tests passed.
• Documentation updated according to the changes.
• Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: ci
type: fix
summary: fix Nightly End-to-End tests report
impact_level: low

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adjusted the CI workflow that generates the Nightly End-to-End tests report by fixing the markdown table separator to match the header column count.

File-Level Changes

Change	Details	Files
Aligned markdown separator line with header columns	Added an extra trailing pipe to the separator string to match the header definition	.github/workflows/nightly_e2e_tests_report.yaml

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