adoc: tables for symbols have headers

[vinniefalco]

No description provided.

[Copilot]

Pull Request Overview

This PR standardizes table headers in AsciiDoc symbol documentation by updating table formatting to use proper header syntax. The changes ensure consistent table structure across all symbol tables in the documentation generator.

• Updates column specifications to include explicit widths ("1,4" instead of just "2")
• Converts inline header definitions to proper AsciiDoc table header syntax
• Adds blank lines after table headers for better formatting

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[Copilot]

These table headers should be updated to match the consistent format used elsewhere in the file. Replace the separate header rows with the single-line format |Name|Description and add a blank line after for consistency.

Suggested change

	| Name
	| Description
	|Name|Description

[Copilot]

These table headers should be updated to match the consistent format used elsewhere in the file. Replace the separate header rows with the single-line format |Name|Thrown on and add a blank line after for consistency.

Suggested change

	| Name
	| Thrown on
	|Name|Thrown on

[cppalliance-bot]

An automated preview of the documentation is available at https://1027.mrdocs.prtest2.cppalliance.org/index.html

[alandefreitas]

The test fixtures would need to be regenerated for this to pass CI. Do you want someone to pick it up?

[alandefreitas]

Oh... That's good.

[alandefreitas]

I'm not sure that's necessary when you define "cols", but that's also fine.

[vinniefalco]

It would be best if I could regenerate the test fixtures and preview the results in the PR. Yet I cannot do so because I can't get the thing set up correctly locally.

[alandefreitas]

Yet I cannot do so because I can't get the thing set up correctly locally.

I can also help with that :)