Update build.yml

Author: NanamiNakano

.github/workflows/build.yml

@@ -31,7 +31,7 @@ jobs:
         with:
           context: .
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           tags: |
             ghcr.io/teamvastsea/backend-server:${{ github.ref_name }}
             ghcr.io/teamvastsea/backend-server:latest