Update usage, remove one badge

README.md

@@ -14,7 +14,6 @@
 [![CRAN use](https://jangorecki.gitlab.io/rdeps/RcppArmadillo/CRAN_usage.svg?sanitize=true)](https://cran.r-project.org/package=RcppArmadillo)
 [![CRAN indirect](https://jangorecki.gitlab.io/rdeps/RcppArmadillo/indirect_usage.svg?sanitize=true)](https://cran.r-project.org/package=RcppArmadillo)
 [![BioConductor use](https://jangorecki.gitlab.io/rdeps/RcppArmadillo/BioC_usage.svg?sanitize=true)](https://cran.r-project.org/package=RcppArmadillo)
-[![StackOverflow](https://img.shields.io/badge/stackoverflow-rcpp-orange.svg)](https://stackoverflow.com/questions/tagged/rcpp)
 [![CSDA](https://img.shields.io/badge/CSDA-10.1016%2Fj.csda.2013.02.005-brightgreen)](https://doi.org/10.1016/j.csda.2013.02.005)
 
 ### Synopsis
@@ -67,7 +66,7 @@ the switch saves about 15% of total compilation time.
 
 The package is mature yet under active development with releases to [CRAN][cran] about once every
 other month, and widely-used by other CRAN packages as can be seen from the [CRAN package page][cran
-pkg].  As of February 2024, there are 1118 CRAN packages using RcppArmadillo.
+pkg].  As of April 2024, there are 1135 CRAN packages using RcppArmadillo.
 
 ### Documentation