fix: if condition in composite action misbehaves (#2473)

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

pkg/runner/testdata/uses-composite-check-for-input-in-if-uses/push.yml

@@ -0,0 +1,24 @@
+name: uses-composite-check-for-input-in-if-uses
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./uses-composite-check-for-input-in-if-uses/composite_action
+        with:
+          b: true
+          b2: true
+      - uses: ./uses-composite-check-for-input-in-if-uses/composite_action
+        with:
+          b: false
+          b2: false
+      - uses: ./uses-composite-check-for-input-in-if-uses/composite_action
+        with:
+          b: true
+          b2: false
+      - uses: ./uses-composite-check-for-input-in-if-uses/composite_action
+        with:
+          b: false
+          b2: true