docs: accurately describe install-links effect on relative paths

[lukekarrys]

No description provided.

[npm-cli-bot]

found 20 benchmarks with statistically significant performance improvements

• app-large: clean, lock-only, cache-only, cache-only:peer-deps, modules-only, no-lock, no-cache, no-modules, no-clean, no-clean:audit
• app-medium: clean, lock-only, cache-only, cache-only:peer-deps, modules-only, no-lock, no-cache, no-modules, no-clean, no-clean:audit

timing results

app-large	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit
npm@8	50.126 ±3.21	19.214 ±0.08	17.167 ±0.05	19.897 ±1.02	3.184 ±0.26	2.988 ±0.04	2.538 ±0.04	11.538 ±0.03	2.407 ±0.01	3.925 ±0.67
#5606	0.109 ±0.00	0.108 ±0.00	0.108 ±0.00	0.108 ±0.00	0.111 ±0.00	0.109 ±0.00	0.110 ±0.00	0.108 ±0.00	0.108 ±0.00	0.110 ±0.00

app-medium	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit
npm@8	33.805 ±1.93	14.280 ±0.16	12.872 ±0.27	13.792 ±0.35	2.698 ±0.00	2.714 ±0.00	2.471 ±0.00	8.739 ±0.00	2.287 ±0.01	3.051 ±0.05
#5606	0.108 ±0.00	0.110 ±0.00	0.108 ±0.00	0.108 ±0.00	0.109 ±0.00	0.108 ±0.00	0.109 ±0.00	0.108 ±0.00	0.108 ±0.00	0.109 ±0.00