docs: update readme instructions for installing db dumps

[korikuzma]

Changes:

• Add command to create anonymous user. Without this, the local installation failed:

  GRANT USAGE ON SCHEMA uta_20210129b TO anonymous;
  ERROR:  role "anonymous" does not exist
  ********* QUERY **********
  ROLLBACK
  **************************
  

• Update UTA version

[korikuzma]

Sorry, I realized I did not create an issue for this and name the branch after the issue title. I can create an issue / new PR if necessary.

[github-actions]

This PR is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[reece]

lgtm. Thanks @korikuzma