Update README.md

Former-commit-id: 91c75e7 [formerly 43a8f23]
Former-commit-id: e275161

Author: rafapereirabr

README.md

@@ -44,7 +44,7 @@ library(geobr)
 |`read_municipality`| Municipality | 1872, 1900, 1911, 1920, 1933, 1940, 1950, 1960, 1970, 1980, 1991, 2000, 2001, 2005, 2007, 2010, 2013, 2014, 2015, 2016, 2017, 2018 |IBGE |
 |`read_weighting_area`| Census weighting area (área de ponderação) |  2000 | IBGE |
 |`read_statistical_grid` | Statistical Grid of 200 x 200 meters | 2010 | IBGE |
-|`read_health_services` | Health facilities | 2015 | CNES, DataSUS | 
+|`read_health_facilities` | Health facilities | 2015 | CNES, DataSUS | 
 
 obs. Data sets at scale 1:250,000, using Geodetic reference system "SIRGAS2000" and CRS(4674).