Remove deprecated install parameter from setup-buildx-action

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: abnegate

.github/workflows/tests.yml

@@ -16,8 +16,6 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-        with:
-          install: true
 
       - name: Build image
         uses: docker/build-push-action@v6