Update 05-document-term-matrices.Rmd for tm.plugin.webmining being ar…

…chived (#113)

* Update 05-document-term-matrices.Rmd

https://cran.r-project.org/web/packages/tm.plugin.webmining/index.html is now archived

* Update language for archival

---------

Co-authored-by: Julia Silge <julia.silge@gmail.com>

05-document-term-matrices.Rmd

@@ -263,8 +263,8 @@ acq_tokens %>%
 
 Here we'll retrieve recent articles relevant to nine major technology stocks: Microsoft, Apple, Google, Amazon, Facebook, Twitter, IBM, Yahoo, and Netflix.
 
-```{block, type = "rmdnote"}
-These results were downloaded in January 2017, when this chapter was written, but you'll certainly find different results if you ran it for yourself. Note that this code takes several minutes to run.
+```{block, type = "rmdwarning"}
+The following results were downloaded in January 2017, when this chapter was written, but as of June 2022 [tm.plugin.webmining](https://cran.r-project.org/package=tm.plugin.webmining) has been archived and is no longer available from CRAN.
 ```
 
 ```{r stock_articles_run, eval = FALSE}