Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-2.0.3.dev0
+2.0.3
  * #1065: Fix a regression in monitoring hooks in which an error pinged the finish state instead of
    the fail state.
  * #1066: Add a "states" option to command hooks, so you can optionally skip an "after" hook if

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "borgmatic"
-version = "2.0.3.dev0"
+version = "2.0.3"
 authors = [
   { name="Dan Helfman", email="witten@torsion.org" },
 ]