provide license token to use mcc when building example

Author: duncanpo

.github/workflows/build_and_test.yml

@@ -3,7 +3,7 @@ on:
     workflow_dispatch:
     push:
 env:
-  MLM_LICENSE_TOKEN: ${{ secrets.MLM_LICENSE_TOKEN }}  # necessary for mcc in building context propagation example      
+  MLM_LICENSE_TOKEN: ${{ secrets.MLM_LICENSE_TOKEN }}
 jobs:
     build-and-run-tests-ubuntu:
         # Running on ubuntu-latest would use a glibc version that is incompatible when using the built mex files on a Debian 11