updating urls

vignettes/gtfstools.Rmd

@@ -59,7 +59,7 @@ list.files(data_path)
 
 - `ggl_gtfs.zip` has been manually built from the [example GTFS feed](https://developers.google.com/transit/gtfs/examples/gtfs-feed) provided by Google. The files samples are licensed under [Creative Commons Attribution 4.0 License](https://creativecommons.org/licenses/by/4.0/).
 - `spo_gtfs.zip` is a subset of the São Paulo's SPTrans feed, available [here](https://www.sptrans.com.br/desenvolvedores/).
-- `ber_gtfs.zip` is a subset of Berlin's GTFS, available [here](https://daten.berlin.de/datensaetze/vbb-fahrplandaten-gtfs).
+- `ber_gtfs.zip` is a subset of Berlin's GTFS, available [here](https://daten.berlin.de/datensaetze/vbb-fahrplandaten-via-gtfs).
 - `poa_gtfs.zip` is a subset of Porto Alegre's EPTC feed, available [here](https://dadosabertos.poa.br/dataset/gtfs).
 
 Throughout this demonstration we will be using São Paulo's and Google's feeds.

vignettes/validating.Rmd

@@ -32,7 +32,7 @@ MobilityData. The validator requires Java 11 or higher to run - you can check
 the version you have currently installed with the command `java -version` on a
 terminal session or with the command `system("java -version")` from your R
 session. If need be, you can download Java 11 from
-https://jdk.java.net/java-se-ri/11.
+https://www.oracle.com/java/technologies/downloads.
 
 Using `validate_gtfs()` is very simple and requires no more than a few function
 calls. First we need to download the validator command-line tool. We can do it