Fix delete cache

Author: dorssel

.github/actions/save-runtime-cache/action.yml

@@ -26,12 +26,14 @@ runs:
     - id: delete
       if: ${{ steps.lookup-runtime-cache.outputs.cache-hit }}
       uses: actions/github-script@v7
+      env:
+        RUNTIME_CACHE_KEY: ${{ steps.lookup-runtime-cache.outputs.key }}
       with:
         script: |
           github.rest.actions.deleteActionsCacheById({
             owner: context.repo.owner,
             repo: context.repo.repo,
-            cache_id: steps.lookup-runtime-cache.outputs.key,
+            cache_id: `${RUNTIME_CACHE_KEY}`,
           })
 
     - id: save