Link fine-tuned model to HuggingFace in README

Co-Authored-By: Claude (claude-fudge-eap-cc) <noreply@anthropic.com>

README.md

@@ -213,7 +213,7 @@ QMD uses three local GGUF models (auto-downloaded on first use):
 |-------|---------|------|
 | `embeddinggemma-300M-Q8_0` | Vector embeddings | ~300MB |
 | `qwen3-reranker-0.6b-q8_0` | Re-ranking | ~640MB |
-| `qmd-query-expansion-1.7B-q4_k_m` | Query expansion (fine-tuned) | ~1.1GB |
+| [`qmd-query-expansion-1.7B-q4_k_m`](https://huggingface.co/tobil/qmd-query-expansion-1.7B-gguf) | Query expansion (fine-tuned) | ~1.1GB |
 
 Models are downloaded from HuggingFace and cached in `~/.cache/qmd/models/`.