Drop linux/arm/v7 support

linux/arm/v7 is not compatible with the latest Tailwind package + takes a significant amount of time when using buildx.  Most Raspberry Pi OS now run on 64 bit ARM architecture, so we should still have significant coverage with linux/amd + linux/arm builds.

Signed-off-by: Zach Gollwitzer <zach@maybe.co>

.github/workflows/publish.yml

@@ -67,7 +67,7 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: ${{ startsWith(github.ref, 'refs/tags/v') && 'linux/amd64,linux/arm64,linux/arm/v7' || 'linux/amd64,linux/arm64' }}
+          platforms: 'linux/amd64,linux/arm64'
           cache-from: type=gha
           cache-to: type=gha,mode=max
           provenance: false