Issue 557: CICD must fail on error

[luwidmer]

Fixes #557

[luwidmer]

This now correctly fails with

── Failed tests ────────────────────────────────────────────────────────────────
Error ('test-spelling.R:18:13'): spelling
Error: Potential spelling errors:
  WORD        FOUND IN
Github      NEWS.md:10
NMAR        NEWS.md:5
Robustify   NEWS.md:10
favor       NEWS.md:8
lifecycle   NEWS.md:7
If these are false positive, run `spelling::update_wordlist()`.

[luwidmer]

@gowerc @gravesti this is ready for review now, I think

[luwidmer]

@gravesti / @gowerc does this work for you?

[gravesti]

This looks alright to me 👍

[luwidmer]

@gravesti could you approve the review step 🙂?

[gravesti]

Thanks @luwidmer