Update README.md

Author: rjonace

README.md

@@ -4,9 +4,9 @@
 ![License](https://img.shields.io/badge/license-MIT-green)
 ![CI](https://img.shields.io/github/actions/workflow/status/rjonace/promptmc/ci.yml)
 
-OpenMC is powerful and but can be painful to use: you hand-write XML, manage batch runs, and read results out of HDF5. It would be great if we could safely use AI to reduce that friction.
+OpenMC is powerful but can be painful to use: you hand-write XML, manage batch runs, and read results out of HDF5. It would be great if we could safely use AI to reduce that friction.
 
-PromptMC does that by providing infrastructure and tooling that allows both AIs and humans to interact with OpenMC through typed, schema-driven workflows.
+PromptMC does that by providing infrastructure and tooling that allows both AI LLM assistants and humans to interact with OpenMC through typed, schema-driven workflows.
 
 It works like a grammar checker between an AI LLM assistant and OpenMC: your AI proposes a configuration, PromptMC validates XML structure and supported schema constraints before the simulator runs, and catches malformed inputs early.