[Portuguese] Update terms to link to Portuguese version

[edsoncelio]

Changes

Use this command below to get all the occurrences:

grep -Ero '\[[^]]+\]\(\/[a-zA-Z0-9\-\/]+\)' --include=\*.md

And change the links to point to the Portuguese version, for example: [confiáveis](/reliability/) to [confiáveis](/pt-br/reliability/)

Before changing, please check if the link is working.

Currently, we have this:

./continuous-delivery.md:[confiáveis](/reliability/)
./scalability.md:[Kubernetes](/kubernetes/)
./scalability.md:[nós](/nodes/)
./distributed-apps.md:[microsserviços](/microservices/)
./data-center.md:[escala da demanda](/scalability/)
./platform-as-a-service.md:[microsserviços](/microservices/)
./platform-as-a-service.md:[observabilidade](/observability/)
./vertical-scaling.md:[nós](/nodes/)
./vertical-scaling.md:[Escalabilidade](/scalability/)
./cloud-native-security.md:[DevSecOps](/devsecops/)
./monolithic-apps.md:[microsserviços](/microservices/)
./application-programming-interface.md:[microsserviços](/microservices/)
./infrastructure-as-code.md:[escalabilidade](/scalability/)
./cloud-native-apps.md:[dimensionamento](/scalability/)
./cloud-native-apps.md:[observabilidade](/observability/)
./bare-metal-machine.md:[virtualização](/virtualization/)
./bare-metal-machine.md:[escala](/scalability/)
./serverless.md:[escala](/scalability/)
./api-gateway.md:[observabilidade](/observability/)
./service.md:[microsserviço](/microservices/)
./cloud-computing.md:[escalar](/scalability/)
./tightly-coupled-architectures.md:[microsserviços](/microservices/)
./function-as-a-service.md:[microsserviços](/microservices/)
./software-as-a-service.md:[escala](/scalability/)