PR checks workflow fails on dependabot PRs because of missing secret

[PavelSBorisov]

PR checks workflow always fails on dependabot PRs because it's missing access to the SONAR_TOKEN secret:

Run sonarsource/sonarcloud-github-action@383f7e52eae3ab0510c3cb0e7d9d150bbaeab838
  with:
    projectBaseDir: .
  env:
    LC_ALL: C.UTF-8
    GITHUB_TOKEN: ***
    SONAR_TOKEN: 
...
Set the SONAR_TOKEN env variable.

[andrewb1269hg]

I looked - there is an organization level SONAR_TOKEN in the hashgraph org. The token may be expired or we may need to implement a repo-level token for this to work correctly.