Fix phone number format according to Anatel

[dgadelha]

According to the Brazilian government's page, https://www.gov.br/anatel/pt-br/regulado/numeracao/plano-de-numeracao-brasileiro, there is no space after the first digit when the phone has a length of 9 digits.

Nove dígitos [abcde-mcdu], para o caso do Serviço Móvel Pessoal (telefonia móvel celular).

This also follows Google's libphonenumber default National formatting for brazilian numbers, as demoed here.

This is also documented in several other documents issued by the government, like:

• https://sistemas.anatel.gov.br/anexar-api/publico/portal-publicar/documentos?numeroPublicacao=344387, page 3
• https://www.gov.br/anatel/pt-br/regulado/numeracao/tabela-servico-movel-celular
• https://www.gov.br/anatel/pt-br/regulado/numeracao/nono-digito