Add MeltwaterNews to Bot detection

[jjk-wweich]

Description:

UserAgent "MeltwaterNews www.meltwater.com" now detected as Bot.

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[sanchezzzhak]

add test to Tests/fixtures/bots.yml file

-
  user_agent: MeltwaterNews www.meltwater.com
  bot:
    name: MeltwaterNews
    category: Crawler
    producer:
      name: Meltwater Deutschland GmbH
      url: https://www.meltwater.com/