[ti_cybersixgill] - update package-spec to 2.10.0

[taylor-swanson]

What does this PR do?

• Update package-spec to 2.10.0
• Ensure event.category is an array
• Ensure threat.tactic.name is an array
• Ensure threat.tactic.id is an array
• Ensure threat.tactic.reference is an array

[git-generate]
go run github.com/andrewkroh/go-examples/ecs-update@latest -ecs-version=8.9.0 -ecs-git-ref=v8.9.0 -format-version=2.10.0 packages/ti_cybersixgill

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.

Related issues

• Relates elastic/security-team#5870

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-08-28T14:59:58.287+0000

• Duration: 15 min 55 sec

Test stats 🧪

Test	Results
Failed	0
Passed	8
Skipped	0
Total	8

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚
Classes	100.0% (1/1)	💚
Methods	93.333% (14/15)	👎 -2.222
Lines	83.962% (178/212)	👎 -3.272
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[elasticmachine]

Package ti_cybersixgill - 1.19.0 containing this change is available at https://epr.elastic.co/search?package=ti_cybersixgill