pin Arduino CLI to 0.33.0

per advice from SpenceKonde about ATTinyCore install

.github/workflows/build_arduino.yaml

@@ -77,6 +77,7 @@ jobs:
       - name: Compile examples
         uses: arduino/compile-sketches@main
         with:
+          cli-version: '0.33.0'
           sketch-paths: ${{ inputs.sketch-paths }}
           fqbn: ${{ inputs.fqbn }}
           libraries: ${{ inputs.libraries }}