Updated adp-overview.adoc to remove superfluous characters

[Feediver1]

Description

Resolves https://github.com/redpanda-data/documentation-private/issues/
Review deadline:

Page previews

Checks

• New feature
• Content gap
• Support Follow-up
• Small fix (typos, links, copyedits, etc)

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📝 Walkthrough

Walkthrough

The change modifies punctuation formatting in the Enterprise governance section of an ADP overview documentation file. Policy headings that previously used double colons or no punctuation now consistently use single colons (e.g., "Security by design: MCP servers"). This is a purely stylistic adjustment affecting four lines with no functional or semantic impact to the documentation content.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• micheleRP

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description follows the template structure but contains incomplete placeholder values and no checked categorization for the change type.	Fill in the actual GitHub issue number, add a review deadline if applicable, provide Netlify preview links, and check the appropriate change category (likely 'Small fix').

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: removing superfluous characters (double colons) from formatting in the adp-overview.adoc file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch Feediver1-patch-3

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