[Sync EN] ext/curl: Fix inaccurate notes in `curl_errno()` and `curl_error()` (#5884)

[github-actions]

Commit: https://github.com/php/doc-en/commit/fa9bae0f65aec476264cf4f828ac9fe253f9839b
PR: https://github.com/php/doc-en/pull/5884

Archivos ES a actualizar

• reference/curl/functions/curl-errno.xml
• reference/curl/functions/curl-error.xml