docs: add --save-bundle to --save usage output

[wraithgar]

No description provided.

[wraithgar]

Supplemental fix to #3174

[nlf]

i clicked approve too soon, the docs test shows you have a dirty git state

[wraithgar]

I ran the docs tests! Ugh.

[npm-robot]

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	53.839 ±3.60	37.670 ±0.91	28.533 ±6.19	25.243 ±0.94	3.470 ±0.10	3.626 ±0.18	2.883 ±0.08	16.269 ±0.50	2.879 ±0.00	3.997 ±0.04
#4388	0.540 ±0.00	0.508 ±0.00	0.520 ±0.02	0.518 ±0.02	0.517 ±0.00	0.528 ±0.02	0.519 ±0.01	0.536 ±0.01	0.569 ±0.03	0.505 ±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	39.220 ±0.20	31.219 ±0.63	17.472 ±0.06	18.792 ±0.31	3.462 ±0.04	3.498 ±0.03	3.146 ±0.02	12.219 ±0.59	2.919 ±0.04	3.994 ±0.06
#4388	0.526 ±0.01	0.551 ±0.06	0.531 ±0.01	0.517 ±0.01	0.524 ±0.02	0.501 ±0.00	0.518 ±0.02	0.518 ±0.02	0.529 ±0.02	0.537 ±0.00