Setting to build only Binary package without Source RPM

I see the workflow generates both the binary and source RPM but I am only interested in packaging the binary RPM.

It would be nice to have a setting of some kind to let the `rpmbuild` action generate only the binary RPM, thus saving CPU time generating items that will not be used.

The Workflow output shows:

```
Complete!
/usr/bin/rpmbuild -ba /github/home/rpmbuild/SPECS/caesarx.spec
```