reference to issues with labels

CONTRIBUTING.md

@@ -41,7 +41,7 @@ The Gauss manager will take care of the rest and keep you in the loop.
 # Testing and reviewing the code you submitted
 In order to test the code provided for new releases we have various nightly slots and for Gauss we have additional dedicated nightly slots.   
 For a MR to be picked up in the nightly the corresponding label has to be selected.   
-The whole up-to-date list with an explanation can be found [here]()
+The whole up-to-date list with an explanation can be found in lhcb/Gauss#12
 
 Gauss in lhcb-sim09 and lhcb-sim09-cmake is built from the head of the Sim09 GitLab branch + the selected MR
 while the one in the other slots is built from master.