fix: output configured registry during publish

[lukekarrys]

Closes: npm/statusboard#416

[npm-robot]

found 4 benchmarks with statistically significant performance improvements

• app-large: modules-only, no-lock
• app-medium: modules-only, no-lock

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@7	55.476 ±11.44	29.224 ±0.12	31.931 ±20.24	19.907 ±1.05	27.329 ±3.36	8.398 ±0.09	2.474 ±0.02	12.041 ±0.13	2.481 ±0.02	3.310 ±0.01
#4143	61.060 ±3.77	31.059 ±0.32	31.901 ±18.57	21.200 ±1.10	3.220 ±0.18	3.108 ±0.08	2.471 ±0.00	12.159 ±0.05	2.516 ±0.03	3.461 ±0.23

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@7	36.424 ±1.50	22.807 ±0.20	13.031 ±0.02	14.144 ±0.18	20.746 ±0.59	7.662 ±0.12	2.503 ±0.05	8.939 ±0.05	2.368 ±0.02	2.907 ±0.03
#4143	37.478 ±3.57	24.249 ±0.01	13.611 ±0.06	14.937 ±0.73	2.875 ±0.01	2.764 ±0.01	2.514 ±0.00	9.383 ±0.01	2.334 ±0.02	2.903 ±0.05