Fix CI errors

[todays-mitsui]

I found that the workflow is failing on the main branch. I am proposing the following fixes to ensure the workflow passes again:

• Updated the snapshot of tests/expandtest.rs
  • 807a3ea
  • There seemed to be a difference in the generated code due to a Rust version upgrade
  • I ran MACROTEST=overwrite cargo test
• Explicitly specified the Node.js version
  • 455ec6b
  • I used actions/setup-node@v4 to specify version v20
• Updated the snapshot of the e2e tests
  • 0f426b8
  • It seems that spaces were unintentionally removed

I have confirmed that the workflow passes after running it on the forked repository.
→ todays-mitsui#3

[siefkenj]

Thanks for this!