Exclude pixels_dice_tray until we can limit what the CI builds, respecting the limited platforms - no bluetooth on S2

.github/workflows/usermods.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Get default environments
       id: envs
       run: |
-        echo "usermods=$(find usermods/ -name library.json | xargs dirname | xargs -n 1 basename | jq -R | grep -v PWM_fan | grep -v BME68X_v2 | jq --slurp -c)" >> $GITHUB_OUTPUT
+        echo "usermods=$(find usermods/ -name library.json | xargs dirname | xargs -n 1 basename | jq -R | grep -v PWM_fan | grep -v BME68X_v2| grep -v pixels_dice_tray | jq --slurp -c)" >> $GITHUB_OUTPUT
     outputs:
       usermods: ${{ steps.envs.outputs.usermods }}