[#655] Update cleveland examples

Description

This is a followup to !924 (merged)

Problem: after switching to the new module structure in cleveland, examples are still using the old one.

Solution: update the examples to compile and pass with the current cleveland HEAD.

This MR also updates some examples to use the correct functions, i.e. specWithUntypedContract instead of specWithContract where needed. For context, the latter was at some point changed to be a synonym for specWithTypedContract.

Also, while at it, fixed a minor inconsistency with module names in testingEDSL.md which slipped through in !924 (merged).

Related issue(s)

Resolves #655 (closed)

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • Root README and other README.md files
    • Haddock
    • docs/
  • I updated changelog files of all affected packages released to Hackage if my changes are externally visible.

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