Document that icc may be available only in certain envs?

[kinow]

Hi, I have a GH Actions setup in a repository with GCC, and I was going to write the YAML + Shell to install oneAPI for icx and icc when I found this repository. Really helpful, thanks!

The readme shows icc, but installing the Ubuntu apt scripts in my repository only brought icx. The package intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic doesn't appear to be included (I think in GitLab it is?). I am installing it locally to test, and it appears to install an older but working version of icc, which is enough for me.

I also had to look at the install_linux_apt.sh source to figure out that I had to use a comma to separate my apckage names, when using more than one in my env var. Maybe that could be documented too?

Thanks!