Add Octave version check to Linux mex-file build script

The build script for the Octave mex-file on Linux has been updated to include a command that checks the Octave version (`octave --version`). This command is executed before the existing command that compiles the mex-file (`octave --eval "mkoctfile --mex octavelibczi.c"`).

.github/workflows/build.yml

@@ -96,6 +96,7 @@ jobs:
         shell: bash
         run: |
           cd OctaveMex
+          octave --version
           octave --eval "mkoctfile --mex octavelibczi.c"
           #cp build/MEXlibCZI/Release/libmexlibczi.so .
           pwd