Release v1.2.1

• Fix Arazzo syntax to use JSON Pointer for body according to ABNF (#37 ).
• Add x-serverUrl examples in Arazzo.
• Improve the sentence case pattern used in lint rules to allow for acronyms and allowing to remove the lint ignore file.
• Fix the index.md docs for consistency and to use the preview command.
• Clarify ticketDate description in the OpenAPI description.
• Remove package-lock.json as it shouldn't typically be distributed in a template type of repo.
• Update contributing file to correct for this specific repo where there are no release pipelines or docs folder.