adding pyinstaller workflow

Author: snhobbs

.github/workflows/pyinstaller-package.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Make executable
       uses: sayyid5416/pyinstaller@v1
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: 3.12
         spec: 'packaging/gui-tklinux.spec'
         upload_exe_with_name: 'isp-programmer-${{ matrix.os }}'
         options: --onefile, --name "ISP Programmer", --windowed