[Fix] `nvm uninstall`: fix alias cleanup glob expansion

The `*` glob was inside double quotes, preventing shell expansion. `nvm_grep -l` received a literal `*` filename instead of the list of alias files, so aliases pointing to uninstalled versions were never cleaned up.

Bug introduced in https://github.com/nvm-sh/nvm/commit/7807a9f09e54a14f9b493c6eeda0022489cda496.