Emmtyper characterization template - Fixed path to blast database and update params

[Daniel-VM]

PR checklist

• This comment contains a description of changes (with reason).
• Make sure your code lints (black and flake8).
• If a new tamplate was added make sure:
  • Template's schema is added in templates/services.json.
  • Template's pipeline's documentation in assets/reports/md/template.md is added.
  • Results Documentation in assets/reports/results/template.md is updated.
• CHANGELOG.md is updated.
• README.md is updated (including new tool citations and authors/contributors).
• If you know a new user was added to the SFTP, make sure you added it to templates/sftp_user.json

PR description

Minor fixes and updates of the characterization template: emmtyper section.

• Fixed path to database.
• updated emmtyper params.

[victor5lm]

LGTM!