CI: install highcharter

Change-Id: Id7616ec28406ba8a42c7a40413f209b38c8ddcb4
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1800a61..b07a7cd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,7 +29,7 @@
     - end_section install_linux_packages
 
     - start_section install_r_packages "Installing missing R packages"
-    - R -e "install.packages(c('devtools', 'RKorAPClient', 'httr', 'tidytext', 'httpuv', 'scales', 'sp', 'raster', 'kableExtra', 'DT', 'svglite', 'qrcode', 'rsvg'))"
+    - R -e "install.packages(c('devtools', 'RKorAPClient', 'httr', 'tidytext', 'httpuv', 'scales', 'sp', 'raster', 'kableExtra', 'DT', 'svglite', 'qrcode', 'rsvg', 'highcharter'))"
     - R -e 'devtools::install_git("https://korap.ids-mannheim.de/gerrit/IDS-Mannheim/idsThemeR")'
     - R -e 'devtools::install(".")'
     - curl -O --output-dir /tmp/ https://gitlab.ids-mannheim.de/ICC/2023-07-20-ICC-ICLC10/-/raw/master/R/common.R