tests: Add 'tests/tail/follow-name' to ignore list

[ChrisDryden]

This one keeps popping up in PR's recently, wanted to add it to reduce the noise

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/tail/follow-name. tests/tail/follow-name is passing on 'main'. Maybe you have to rebase?

[codspeed-hq]

Merging this PR will degrade performance by 3.24%

⚡ 1 improved benchmark
❌ 1 regressed benchmark
✅ 280 untouched benchmarks
⏩ 38 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Memory	du_wide_tree[(5000, 500)]	1.2 MB	1.2 MB	+3.73%
❌	Memory	dd_copy_partial	129.1 KB	133.5 KB	-3.24%

---

_{Comparing ChrisDryden:intermittent (fb4dbe0) with main (b5bbabc)}

Footnotes

1. 38 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩