feat: bump to use node20 runtime

Signed-off-by: Rui Chen <rui@chenrui.dev>

action.yml

@@ -25,7 +25,7 @@ outputs:
   cache-hit:
     description: 'A boolean value to indicate if a cache was hit'
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/setup/index.js'
   post: 'dist/cache-save/index.js'
   post-if: success()