statsd_input: Improve documentation

[shmsr]

• Bug

What does this PR do?

Improves the documentation for statsd_input package.

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.
• I have verified that Kibana version constraints are current according to guidelines.

[elasticmachine]

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• Start Time: 2023-07-25T10:51:57.645+0000

• Duration: 17 min 41 sec

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Test	Results
Failed	0
Passed	2
Skipped	0
Total	2

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[elasticmachine]

💚 Build Succeeded

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• Commit: 73fe186

History

• 💚 Build #110 succeeded 6fc2921

[botelastic]

Hi! We just realized that we haven't looked into this PR in a while. We're sorry! We're labeling this issue as Stale to make it hit our filters and make sure we get back to it as soon as possible. In the meantime, it'd be extremely helpful if you could take a look at it as well and confirm its relevance. A simple comment with a nice emoji will be enough :+1. Thank you for your contribution!

[lalit-satapathy]

Rest of the changes LGTM.

[ali786XI]

LGTM

[elasticmachine]

Package statsd_input - 0.2.3 containing this change is available at https://epr.elastic.co/search?package=statsd_input