message: Updates RELEASE-NOTES about cli11 upgrade
diff: @@ -45,6 +45,7 @@ The Axom project release numbers follow [Semantic Versioning](http://semver.org/
  was not the appropriate name. This macro elides warnings about unused variables
  - Inlet's `isUserProvided` can now be used to query the status of subobjects of a `Container` via a name parameter
  - Upgrades our `vcpkg` usage for automated Windows builds of our TPLs to its [2021.05.12 release](https://github.com/microsoft/vcpkg/releases/tag/2021.05.12)
  +- Upgrades built-in `cli11` library to its [v1.9.1 release](https://github.com/CLIUtils/CLI11/releases/tag/v1.9.1)
  ### Fixed
  - Fixed Primal's `intersect(Ray, Segment)` calculation for Segments that do not have unit length
  