fix: add inline caveat to 100% accuracy claim in README table (#997)

The table cell now reads "100% first-action (n=45, shared entry point)"
instead of just "100% (validated, n=45)" so the limitation is visible
even when the table is read without the surrounding paragraph.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: abrichr

README.md

@@ -170,7 +170,7 @@ Zero-shot VLMs fail on GUI tasks not due to lack of capability, but due to **amb
 
 | | No Retrieval | With Retrieval |
 |---|---|---|
-| **No Fine-tuning** | 46.7% (zero-shot baseline) | **100%** (validated, n=45) |
+| **No Fine-tuning** | 46.7% (zero-shot baseline) | **100%** first-action (n=45, shared entry point) |
 | **Fine-tuning** | Standard SFT (baseline) | **Demo-conditioned FT** (planned) |
 
 The bottom-right cell is OpenAdapt's unique value: training models to **use** demonstrations they haven't seen before, combining retrieval with fine-tuning for maximum accuracy. Phase 2 (retrieval-only prompting) is validated; Phase 3 (demo-conditioned fine-tuning) is in progress.