fix url in readme [ci.skip]

README.md

@@ -3,7 +3,7 @@
 Docs: https://int.docs.switch.ch/en/Services/ShibbolethSPHelmChart
 
 Note that the image used by this Helm chart (by default) is built / hosted in a separate project:
-https://gitlab-int.switch.ch/maps/shibboleth-sp-image/
+https://gitlab.switch.ch/helm-charts/shibboleth-sp/image
 
 ## GitLab CI Pipeline:
 The pipeline will run separate tasks depending on the type of push: