fix: post step failure is job failure (#5297)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/runner/testdata/post-step-failure-is-job-failure/post-step-failure/action.yml

@@ -0,0 +1,4 @@
+runs:
+  using: node20
+  main: main.js
+  post: post.js 

pkg/runner/testdata/post-step-failure-is-job-failure/post-step-failure/post.js

@@ -0,0 +1,2 @@
+console.log('This is a post step failure test');
+process.exit(1);

pkg/runner/testdata/post-step-failure-is-job-failure/push.yml

@@ -0,0 +1,9 @@
+name: basic
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./post-step-failure-is-job-failure/post-step-failure