Prepare Newton 1.5.1rc1 (#4062)

Author: jcarius-nv

docs/api/newton.rst

@@ -74,6 +74,6 @@ newton
    * - ``MAXVAL``
      - ``10000000000.0``
    * - ``__version__``
-     - ``1.5.0``
+     - ``1.5.1rc1``
    * - ``use_coord_layout_targets``
      - ``False``

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "uv_build"
 
 [project]
 name = "newton"
-version = "1.5.0"
+version = "1.5.1rc1"
 license = "Apache-2.0"
 license-files = ["LICENSE.md", "newton/licenses/**/*.txt"]
 authors = [{ name = "Newton Developers", email = "developers@newton-physics.org" }]