message: docs(rtl): adding RTL label tp pull request template
diff: - {{removed thing}}
  <!-- Deploy Previews are enabled by applying the following labels for the corresponding package: -->
  -<!-- *** "package: react" -->
  -<!-- *** "package: vanilla" -->
  -<!-- *** "package: services" -->
  -<!-- *** "package: utilities" -->
  -<!-- *** "package: styles" -->
  +<!-- *** "package: react": React, React (experimental) -->
  +<!-- *** "package: vanilla": Vanilla -->
  +<!-- *** "package: services": Services -->
  +<!-- *** "package: utilities" Utilities -->
  +<!-- *** "package: styles" Carbon Expressive, React (Expressive) -->
  +<!-- *** "RTL" React (RTL) -->
  