Fix T5 G2P Input and Output Types
# What does this PR do ?

Fix T5 G2P Input and Output Types

**Collection**: tts

# Changelog 
- Fix T5 G2P Input and Output Types

**PR Type**:
- [ ] New Feature
- [x] Bugfix
- [ ] Documentation

If you haven't finished some of the above items you can still open "Draft" PR.
