[stable-2.15] Update sdist path in release tool

The latest setuptools package uses a normalized package name for the sdist.
(cherry picked from commit 8bc0d809a6)

Co-authored-by: Matt Clay <matt@mystile.com>

packaging/release.py

@@ -856,7 +856,7 @@ def test_built_artifact(path: pathlib.Path) -> None:
 
 def get_sdist_path(version: Version, dist_dir: pathlib.Path = DIST_DIR) -> pathlib.Path:
     """Return the path to the sdist file."""
-    return dist_dir / f"ansible-core-{version}.tar.gz"
+    return dist_dir / f"ansible_core-{version}.tar.gz"
 
 
 def get_wheel_path(version: Version, dist_dir: pathlib.Path = DIST_DIR) -> pathlib.Path: