fix: 🐛 Remove unsupported platform 'linux/arm/v6' from Docker build configuration

Author: OidaTiftla

.github/workflows/docker-publish.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           context: .
           push: true
-          platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6,linux/386
+          platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/386
           tags: |
             ghcr.io/${{ steps.setup.outputs.owner_lower }}/calendar-proxy:latest
             ghcr.io/${{ steps.setup.outputs.owner_lower }}/calendar-proxy:${{ github.sha }}