test: update builder image references in release evidence fixtures

Builder switched from container (python:3.11-slim) to github-hosted runner
with setup-python; test fixtures must match the new approved image string.

Author: Coding-Dev-Tools

tests/test_release_evidence.py

@@ -135,10 +135,7 @@ def _release_inputs(root, dist):
     builders = [
         {
             "name": name,
-            "image": (
-                "python:3.11-slim@sha256:"
-                "a630a63cdb314e2d138a2fca3e375e319e8568346ffafac5b980f888630ac4f1"
-            ),
+            "image": "github-hosted:ubuntu-latest/python-3.11",
             "python": "3.11",
             "environment_lock_sha256": "e" * 64,
             "toolchain": {
@@ -515,7 +512,7 @@ def test_release_workflow_publishes_complete_captured_evidence():
     assert "name: build-environment-evidence" in build
     assert "dist-repeat" not in build
     assert "Independent distribution builder ${{ matrix.builder }}" in reproducibility
-    assert "python:3.11-slim@sha256:a630a63c" in reproducibility
+    assert "github-hosted:ubuntu-latest/python-3.11" in reproducibility
     assert 'builder: ["a", "b"]' in reproducibility
     assert "Compare independent distribution builders" in reproducibility
     assert "name: independent-reproducibility" in reproducibility

tests/test_release_infrastructure.py

@@ -297,7 +297,7 @@ def test_release_builds_one_portable_open_core_wheel():
     assert release.count("python -m build") == 2
     assert "python -m build --outdir dist-repeat" not in release
     assert 'builder: ["a", "b"]' in release
-    assert "python:3.11-slim@sha256:a630a63c" in release
+    assert "github-hosted:ubuntu-latest/python-3.11" in release
     assert "Compare independent distribution builders" in release
     assert "python scripts/verify_distribution_contents.py dist/*" in release
     assert "Build compiled wheels" not in release