feat: add arm/v7 to buildx platforms (#802)

added arm/v7 to buildx platforms
Co-authored-by: M. Gschwandtner <84477901+OnlyPain-ctrl@users.noreply.github.com>

.github/workflows/build-and-push-release-image.yml

@@ -39,6 +39,6 @@ jobs:
         with:
           context: ./
           file: ./Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
           push: true
           tags: neosmemo/memos:latest, neosmemo/memos:${{ env.VERSION }}