[BUG] Default instructions do not work if you use macOS

[antejavor]

Describe the bug
If you use MacOS you need to change the host.docker.internal instead of localhost in the config/prometeus.yaml

This:

global:
  scrape_interval: 15s
  evaluation_interval: 15s

scrape_configs:
  - job_name: "memgraph-metrics"
    static_configs:
      - targets: ["localhost:9115"]

Should be replaced with this:

global:
  scrape_interval: 15s
  evaluation_interval: 15s

scrape_configs:
  - job_name: "memgraph-metrics"
    static_configs:
      - targets: ["host.docker.internal:9115"]

This should be implemented in the exporter code.