docs: fix typos / words

docs/details/jwk-creation.md

docs/details/schema-reference.md

docs/getting-started/overview.md

docs/getting-started/receiving/query.mdx

docs/getting-started/receiving/validate.mdx

docs/getting-started/sending/get-destination.mdx

docs/getting-started/sending/query-status.mdx

docs/getting-started/sending/start-submission.mdx

docs/getting-started/submission-structure.mdx