fix(ci): setting GOARCH as GHA env

Author: mxcd

.github/workflows/build.yml

@@ -33,9 +33,11 @@ jobs:
         with:
           go-version: 1.19
       - name: golang build
+        env:
+          GOARCH: ${{ matrix.arch }}
         run: |
           cd cmd/gitops
-          GOARCH=${{ matrix.arch }} go build -ldflags="-s -w" .
+          go build -ldflags="-s -w" .
       - name: Upload binaries to release
         uses: svenstaro/upload-release-action@v2
         with: