message: fix: encoding issue in CDN responses
  When downloading the redoc JS from redoc.ly CDN (e.g.
  https://cdn.redoc.ly/redoc/latest/bundles/redoc.standalone.js) the
  Content-Type header in the response is missing 'charset=utf-8', causing
  the file to be displayed with garbled characters.
diff: @@ -8,7 +8,9 @@ VERSION=$(node scripts/version.js)
  VERSION_TAG=v${VERSION:0:1}.x
  copy_to_s3 () {
  - aws s3 cp bundles "s3://redocly-cdn/redoc/$1/bundles" --recursive
  + aws s3 cp --exclude "*" --include "*.js" --content-type "application/javascript; charset=utf-8" bundles "s3://redocly-cdn/redoc/$1/bundles" --recursive
  + aws s3 cp --exclude "*" --include "*.map" --content-type "application/json" bundles "s3://redocly-cdn/redoc/$1/bundles" --recursive
  + aws s3 cp --exclude "*" --include "*.txt" bundles "s3://redocly-cdn/redoc/$1/bundles" --recursive
  aws s3 cp CHANGELOG.md "s3://redocly-cdn/redoc/$1/CHANGELOG.md"
  aws s3 cp LICENSE "s3://redocly-cdn/redoc/$1/LICENSE"
  aws s3 cp package.json "s3://redocly-cdn/redoc/$1/package.json"
  