MPP-3652 - Update monitor branding

[lloan]

L10N PR: mozilla-l10n/fx-private-relay-l10n#168
This PR fixes addresses MPP-3652

New feature description

Updates Firefox Monitor to Mozilla Monitor strings found in Bento Box component.

Screenshot (if applicable)

Not applicable.

How to test

Open the bento component and verify that it reads Mozilla Monitor rather than Firefox Monitor

Checklist (Definition of Done)

• Product Owner accepted the User Story (demo of functionality completed) or waived the privilege.
• Customer Experience team has seen or waived a demo of functionality.
• All acceptance criteria are met.
• Jira ticket has been updated (if needed) to match changes made during the development process.
• I've added or updated relevant docs in the docs/ directory
• Jira ticket has been updated (if needed) with suggestions for QA when this PR is deployed to stage.
• All UI revisions follow the coding standards, and use Protocol tokens where applicable (see /frontend/src/styles/tokens.scss).
• Commits in this PR are minimal and have descriptive commit messages.
• l10n changes have been submitted to the l10n repository, if any.

[groovecoder]

Looks good in both English and non-English.