[ci] Fix build features

Author: Jake-Shadle

.github/workflows/ci.yml

@@ -186,7 +186,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: build
-          args: --release --target ${{ matrix.target }} --features="gcs,s3"
+          args: --release --target ${{ matrix.target }} --features=gcs,s3
       - name: Package
         shell: bash
         run: |