[Github] Fix docs for Audit log permissions

[kcreddy]

What does this PR do?

Github token doesn't require admin:org scope in order to fetch the audit logs of an organization. This PR removes that scope from the token permissions.

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

• Fix docs

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-09-25T07:06:24.055+0000

• Duration: 16 min 0 sec

Test stats 🧪

Test	Results
Failed	0
Passed	34
Skipped	0
Total	34

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (5/5)	💚
Files	100.0% (5/5)	💚
Classes	100.0% (5/5)	💚
Methods	100.0% (65/65)	💚
Lines	93.874% (996/1061)	👎 -2.003
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[bhapas]

Nits

[bhapas]

LGTM

[elasticmachine]

Package github - 1.23.1 containing this change is available at https://epr.elastic.co/search?package=github