ci: Fix spellcheck issues

[popzxc]

What ❔

cargo-spellcheck got bumped to 0.14.0 in CI, and it started to discover more problems.
This PR aims to fix that.

Why ❔

Dead CI bad

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.
• Spellcheck has been run via zk spellcheck.
• Linkcheck has been run via zk linkcheck.

[ilitteri]

There's an error with zk linkcheck that is removing the PR from the merge queue

 FILE: ./core/bin/snapshots_creator/README.md
  [✖] #snapshots-format
  [✓] ../../../docs/guides/setup-dev.md
  [✓] ../../tests/snapshot-recovery-test/tests/snapshot-recovery.test.ts
  [✓] ../../lib/types/src/snapshots.rs
  [✓] ../../lib/object_store

  5 links checked.

  ERROR: 1 dead links found!
  [✖] #snapshots-format → Status: 404

I got the same error locally, but the link works fine if I click it.

[EmilLuta]

We're turning off linkcheck, usually breaks from github which rate limits us.

[kelemeno]

Disabling linkcheck was not successful

[EmilLuta]

Not really. We just can't get anything to merge. :/