added a bit of text

README.md

@@ -1,3 +1,7 @@
 List of failed R packages builds on Hydra with rank of packages added (thanks to {packageRank})
 
 https://raw.githack.com/b-rodrigues/nixpkgs-r-updates-fails/targets-runs/output/r-updates-fails.html
+
+The action generating the website runs each day at midnight. Do check the original on Hydra,
+because Bioconductor packages are not listed, nor packages for which somehow {packageRank}
+can't find a ranking.

r-updates-fails.Rmd

@@ -21,7 +21,13 @@ results_df <- subset(results_table_with_rank$package.data,
 ```
 
 The table below can be found at `r last_jobset_url`, but here it includes the rank of the package
-as computed by the `{packageRank}` package:
+as computed by the `{packageRank}` package, as well as a link to the PR to fix the build
+if it has been opened. For now, a package that doesn't build because one of its dependencies
+is broken is not linked to its dependency's open PR.
+
+The action generating the website runs each day at midnight. Do check the original on Hydra,
+because Bioconductor packages are not listed, nor packages for which somehow {packageRank}
+can't find a ranking.
 
 ```{r, echo = FALSE}
 targets::tar_load(failing_jobs)