Fix: R2 doesn't support CRC32 validation yet, while "aws s3" demands it

AWS CLI decided to enable for everyone strict validation that the
CRC32 is correct on uploading of files. But R2 doesn't support this
yet, resulting in errors.

For now, work around this problem by disabling this validation.

.github/workflows/update-cdn.yml

@@ -66,7 +66,9 @@ jobs:
           --bucket-id ${{ secrets.CDN_R2_BUCKET }} \
           --new-release ${{ inputs.folder || github.event.client_payload.folder }}/${{ inputs.version || github.event.client_payload.version }}
 
-        aws s3 cp \
+        # Disable CRC validation, as currently Cloudflare R2 doesn't support this yet.
+        # See https://www.cloudflarestatus.com/incidents/t5nrjmpxc1cj for more information.
+        AWS_REQUEST_CHECKSUM_CALCULATION=WHEN_REQUIRED AWS_RESPONSE_CHECKSUM_VALIDATION=WHEN_REQUIRED aws s3 cp \
           --recursive \
           --endpoint-url ${{ secrets.CDN_R2_ENDPOINT }} \
           --only-show-errors \