l10n.yml: Use git clone --depth=1

[oech3]

No description provided.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)

[codspeed-hq]

Merging this PR will degrade performance by 6.24%

⚡ 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	cp_large_file[16]	109.6 KB	116.9 KB	-6.24%
⚡	Memory	du_wide_tree[(5000, 500)]	1.3 MB	1.2 MB	+3.12%

---

_{Comparing oech3:patch-9 (d0bd7ad) with main (8d02762)}

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. ↩