publish: must not build mex first, as its cached

Author: scivision

.github/workflows/publish.yml

@@ -47,7 +47,10 @@ jobs:
       - name: Run Matlab buildtool
         uses: matlab-actions/run-build@v2
         with:
-          tasks: test publish
+          tasks: publish
+# don't run "test" task as then even "clean" will leave Matlab in cached state where
+# it won't publish due to thinking a function is a Mex file. Error is
+# "Error using publish Only MATLAB code can be published"
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3