add zip download

README.md

@@ -4,12 +4,13 @@ In this project, plots are generated from service usage data.
 The data is incorporated via submodules from separate projects.
 
 
-##  Generated Plots
+##  Generated Plots (most recent)
 
 The plots are generated automatically when changes are detected or the generation pipeline is triggered.
 
 * [**Latest build, all graphs**](https://gitlab.hzdr.de/jandt-desy/service-usage-plots-ci/-/jobs/artifacts/master/browse/plots?job=plot_general)
-* [Reported graphs](example_graphs.md), used in reports, reproduced with most recent data.
+* [Download all graphs in zip file](https://gitlab.hzdr.de/jandt-desy/service-usage-plots-ci/-/jobs/artifacts/master/download/plots?job=plot_general)
+* [Previously used graphs](example_graphs.md), used in reports, reproduced with most recent data.
 * Example of inline svg (AAI users):  
   ![AAI users](https://gitlab.hzdr.de/jandt-desy/service-usage-plots-ci/-/jobs/artifacts/master/raw/plots/svg/aai_users-plot_2.svg?job=plot_general)