Speed up release workflow

- Remove duplicate tests (already run on push to main)
- Build only for amd64 (arm64 rarely needed for VPS)

.github/workflows/release.yml

@@ -9,25 +9,9 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  test:
-    name: Test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-
-      - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
-
-      - name: Run tests
-        run: cargo test --package nora-registry
-
   build:
     name: Build & Push
     runs-on: ubuntu-latest
-    needs: test
     permissions:
       contents: read
       packages: write
@@ -63,7 +47,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}