Update ollama.md

[MeDott29]

llama3 > llama2

---

:rocket: This description was created by Ellipsis for commit b2dd7654b9201d714fc84a26f8264deee268fdba

Summary:

Updated the model version in ollama.md from llama2 to llama3 for both the pull command and example usage.

Key points:

• Updated ollama.md to use llama3 instead of llama2.
• Changed both the pull command and the model reference in the example code.

---

Generated with :heart: by ellipsis.dev