[AbuseCH package] update image icon

[P1llus]

What does this PR do?

Fixes the image for abuseCH. While the icon is a bit small, there is no official SVG, so we had to use an image that does not scale as well as a proper SVG logo.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• If I'm introducing a new feature, I have modified the Kibana version constraint in my package's manifest.yml file to point to the latest Elastic stack release (e.g. ^7.13.0).

Related issues

• Closes [AbuseCH] Package icon is not visible in Integrations app #1922
• Closes AbuceCH icon is invisible because it is white #1935

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[elasticmachine]

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Build stats

• Start Time: 2021-10-19T09:36:38.107+0000

• Duration: 28 min 58 sec

• Commit: 81f04e6

Test stats 🧪

Test	Results
Failed	0
Passed	15
Skipped	0
Total	15

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