Update dashboard signal documentation

[melange396]

Make markdown table at

delphi-epidata/docs/api/covidcast_signals.md

Lines 33 to 41 in 08de322

	| Public Behavior | People Wearing Masks | [`fb-survey`](covidcast-signals/fb-survey.md) | `smoothed_wwearing_mask_7d` |
	| Public Behavior | Vaccine Acceptance | [`fb-survey`](covidcast-signals/fb-survey.md) | `smoothed_wcovid_vaccinated_appointment_or_accept` |
	| Public Behavior | COVID Symptom Searches on Google | [`google-symptoms`](covidcast-signals/google-symptoms.md) | `sum_anosmia_ageusia_smoothed_search` |
	| Early Indicators | COVID-Like Symptoms | [`fb-survey`](covidcast-signals/fb-survey.md) | `smoothed_wcli` |
	| Early Indicators | COVID-Like Symptoms in Community | [`fb-survey`](covidcast-signals/fb-survey.md) | `smoothed_whh_cmnty_cli` |
	| Early Indicators | COVID-Related Doctor Visits | [`doctor-visits`](covidcast-signals/doctor-visits.md) | `smoothed_adj_cli` |
	| Cases and Testing | COVID Cases | [`jhu-csse`](covidcast-signals/jhu-csse.md) | `confirmed_7dav_incidence_prop` |
	| Late Indicators | COVID Hospital Admissions | [`hhs`](covidcast-signals/hhs.md) | `confirmed_admissions_covid_1d_prop_7dav` |
	| Late Indicators | Deaths | [`jhu-csse`](covidcast-signals/jhu-csse.md) | `deaths_7dav_incidence_prop` |

match the current state in https://github.com/cmu-delphi/delphi-epidata/blob/dev/src/server/endpoints/covidcast_utils/descriptions.raw.txt, after recent changes to it in #1334 and #1335, and probably older modifications as well.

[BrainIsDead]

@melange396 could you pls describe a bit more detail this task

[melange396]

@BrainIsDead There is a table in docs/api/covidcast_signals.md that has (or at least is supposed to have) information for the signals shown on the public COVIDcast dashboard. The signals shown are actually controlled by the contents of src/server/endpoints/covidcast_utils/descriptions.raw.txt. Changes have been made to descriptions.raw.txt (signals have been added and removed as in #1334 and #1335) but the list of signals in covidcast_signals.md was not updated to match.

[melange396]

Update: more changes to the referenced signals were done in cmu-delphi/www-covidcast#1264 (comment)