updating installation instructions (#13)

README.md

@@ -1,3 +1,15 @@
 # nestcolor
 
 Package managing visual conventions of NEST graphs
+
+## Installation
+
+For releases from August 2022 it is recommended that you [create and use a Github PAT](https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/creating-a-personal-access-token) to install the latest version of this package. Once you have the PAT, run the following:
+
+```r
+Sys.setenv(GITHUB_PAT = "your_access_token_here")
+if (!require("remotes")) install.packages("remotes")
+remotes::install_github("insightsengineering/nestcolor@*release")
+```
+
+Although `nestcolor` was not released in June 2022, a stable release of all `NEST` packages which were released in June 2022 is also available [here](https://github.com/insightsengineering/depository#readme).