docs: remove link to cache command

[wraithgar]

The cache command itself contains this config making it a circular reference

[npm-cli-bot]

no statistically significant performance changes detected

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	43.901 ±0.36	18.669 ±0.03	16.790 ±0.05	20.439 ±2.07	3.170 ±0.17	3.030 ±0.00	2.442 ±0.08	11.575 ±0.03	2.418 ±0.01	4.222 ±1.10
#5637	44.476 ±1.33	18.563 ±0.05	16.882 ±0.19	20.040 ±1.10	3.078 ±0.06	3.037 ±0.05	2.406 ±0.03	11.713 ±0.05	2.443 ±0.03	3.564 ±0.22

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	30.105 ±0.62	14.794 ±0.32	13.105 ±0.10	14.377 ±0.47	2.698 ±0.03	2.718 ±0.02	2.542 ±0.09	8.904 ±0.02	2.312 ±0.02	3.189 ±0.02
#5637	29.382 ±0.82	14.684 ±0.22	13.197 ±0.18	14.291 ±0.47	2.748 ±0.01	2.839 ±0.05	2.520 ±0.02	9.015 ±0.02	2.297 ±0.01	3.359 ±0.30