Refactor "Build a Grafana dashboard" docs

[artc95]

Github docs/api-docs/public-api-to-grafana.md

• line 32
  for "a Soda Cloud account", link instead to free trial signup i.e. https://cloud.soda.io/select-region?

• line 45
  it should be scan definition ID instead of scan def name? proposed refactor:

2. In the dialog that opens, check the scan definition name from the Add to Scan Definition field. Under "Scans", above the scan definition name, copy the scan definition ID (in lowercase, with spaces represented by underscores). Paste the scan definition ID in a temporary local file, which will be needed in the next steps to trigger a scan via the Soda Cloud API.
   

• line 111
  add "to" i.e. "...as the value, according to the region in..."

• line 127
  add missing quotations marks "

...metadata-generation-failed , and suggestion "If you prefer...

• line 137
  advise to replace grafanascan0 with scan definition ID user copied in "Choose a scan definition" step previously. e.g.

...which, in this case, is grafanascan0. Replace grafanascan0 with the scan definition ID you copied earlier in the "Choose a scan definition" step.