Set AWS_REGION as a global env variable (#67)

.github/workflows/build.yml

@@ -7,6 +7,10 @@ on:
     tags:
       - v*
 
+# Global vars
+env:
+  AWS_REGION:                   "us-east-1"
+
 jobs:
   build:
     name:                       Build Release
@@ -14,7 +18,6 @@ jobs:
       SCCACHE_CACHE_SIZE:       "1G"
       SCCACHE_IDLE_TIMEOUT:     0
       AWS_S3_ARTIFACTS_BUCKET:  "openethereum-releases"
-      AWS_REGION:               "us-east-1"
     strategy:
       matrix:
         platform:
@@ -237,7 +240,7 @@ jobs:
         run: |
           # Deploy zip artifacts to S3 bucket to a directory whose name is the tagged release version.
           # Deploy macos binary artifact (if required, add more `aws s3 cp` commands to deploy specific OS versions)
-          aws s3 cp macos-artifacts/openethereum s3://${{ env.AWS_S3_ARTIFACTS_BUCKET }}/${{ env.RELEASE_VERSION }}/macos/
+          aws s3 cp macos-artifacts/openethereum s3://${{ env.AWS_S3_ARTIFACTS_BUCKET }}/${{ env.RELEASE_VERSION }}/macos/ --region ${{ env.AWS_REGION }}
 
     outputs:
       linux-artifact:           ${{ steps.create_zip_linux.outputs.LINUX_ARTIFACT }}