Docs & CSS: Minor Grammar Fixes and Toggle Alignment Improvements

[MarsonKotovi4]

PR Description

• Summary of Changes

  • toggle.css: Changed align-items: right to align-items: flex-end for clearer label alignment.
  • abstract-contracts.rst: Corrected grammar (“can not” → “cannot”) to clarify abstract contract instantiation rules.
  • errors.rst: Tweaked phrasing about errors indistinguishable by the ABI for improved readability.

• Issue Reference

  • No related issue. This PR was created from scratch and does not close or fix any specific issue.

• Breaking Changes

  • This PR introduces no breaking changes and is branched off develop.

• Dependencies

  • None.

• Tests & Documentation

  • No code behavior changes, so no new tests were added.
  • Only documentation and CSS updates were made.
  • No updates required for existing test expectations.

• Additional Notes

  • Branch name: improve-toggle-css-and-docs (example).
  • This PR is my only open PR, so it aligns with the requirement of working on just one at a time.
  • Since the changes are non-breaking and purely aesthetic/documentation-related, no changelog entry is required.

Checklist:

• No other open PRs.
• Not a breaking change.
• No issue to reference (Fixes #...) because this PR is a standalone improvement.
• No dependencies on other PRs.
• Documentation changes are small clarifications; tests remain unaffected.

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[nikola-matic]

I'll be closing this PR since none of the changes seem to fix or improve much of anything.