Add dev fork readme note.

samcunliffe · web-flow · commit 1d002027d8cc · 2025-06-09T15:23:52.000+01:00
diff --git a/README.md b/README.md
@@ -5,6 +5,9 @@
 </div>
 <!-- markdownlint-restore -->
 
+> [!CAUTION]
+> This is Sam's dev fork.
+
 This repository collects the [UCL ARC] recommendations for a research software
 project in Python. It contains a template for new Python packages and a
 [website] documenting our recommendations. We've turned on
