Bump to v2.3.1

oscarhiggott · oscarhiggott · commit f86c7fd928ad · 2025-09-25T18:53:13.000Z
diff --git a/src/pymatching/_version.py b/src/pymatching/_version.py
@@ -1 +1 @@
-__version__ = "2.3.dev1"    # pragma no cover
+__version__ = "2.3.1"    # pragma no cover
