docs(teams): updated team docs to reflect new MFA workflow for npm team api

[blkdm0n]

What / Why

Update CLI docs to reflect the extension of MFA to encompass the team api

[npm-deploy-user]

	angular-quickstart			app-large			app-medium			ember-quickstart			react-app
	prev	current	status	prev	current	status	prev	current	status	prev	current	status	prev	current	status
initial install	41s	30s	✅	39.5s	31.3s	✅	34.5s	26.4s	✅	28.1s	22.1s	✅	33.5s	25s	✅
repeat install	9.6s	7s	✅	8.6s	6.2s	✅	8.3s	6.4s	✅	7.7s	7.2s	✅	9.1s	6.6s	✅
with warm cache	32.3s	26.8s	✅	33.8s	23.9s	✅	31.3s	24.4s	✅	23.4s	17.3s	✅	29.1s	21.8s	✅
with node_modules	9.2s	7.7s	✅	8.6s	5.6s	✅	9s	5.5s	✅	7.8s	5.2s	✅	9.4s	7.4s	✅
with lockfile	32.6s	23.5s	✅	31s	26.4s	✅	29s	26.4s	✅	21.7s	15.8s	✅	27.4s	19.8s	✅
with warm cache and node_modules	9.3s	6.2s	✅	7.9s	5.3s	✅	8.4s	5.5s	✅	7.6s	5.3s	✅	9.2s	8.1s	✅
with warm cache and lockfile	24.7s	17.7s	✅	26.3s	18.2s	✅	24.3s	16.2s	✅	17.8s	12.1s	✅	21.3s	16.1s	✅
with node_modules and lockfile	10.1s	8.9s	✅	9.8s	6.4s	✅	8.6s	6.2s	✅	7.8s	5.8s	✅	9.7s	6.7s	✅