Add WithImageTag example to SQL Server integration documentation

[Copilot]

Addresses #101 - Add documentation showing how to use WithImageTag() to run different SQL Server versions.

Changes

• Added new subsection "Use a specific SQL Server container image tag" under the hosting integration section
• Includes link to MCR for available tags

Example

var sql = builder.AddSqlServer("sql")
                 .WithImageTag("2025-RTM-ubuntu-24.04-preview");

• Fixes [SqlServer] Include example using WithImageTag() #101

Original prompt

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This section details on the original issue you should resolve

<issue_title>[SqlServer] Include example using WithImageTag()</issue_title>
<issue_description>I'd like to see https://aspire.dev/integrations/databases/sql-server/ include an example using WithImageTag() to demonstrate how to run with different versions of SQL Server.</issue_description>

<agent_instructions>Please include a new subsection under the hosting integration that follows the existing subsections, and details how to use WithImageTag API to address #101</agent_instructions>

Comments on the Issue (you are Copilot in this section)

• Fixes [SqlServer] Include example using WithImageTag() #101

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[David Pine (IEvangelist)]

Hey Copilot, maybe use this tag instead for the sample? https://mcr.microsoft.com/en-us/artifact/mar/mssql/server/tag/2025-RTM-ubuntu-24.04-preview

[Copilot]

Hey Copilot, maybe use this tag instead for the sample? https://mcr.microsoft.com/en-us/artifact/mar/mssql/server/tag/2025-RTM-ubuntu-24.04-preview

Updated the example to use 2025-RTM-ubuntu-24.04-preview in a9d92f9.

[Copilot]

Pull request overview

This PR addresses issue #101 by adding documentation for the WithImageTag() method in the SQL Server integration guide, enabling developers to specify particular SQL Server container versions.

• Added a new subsection demonstrating WithImageTag() usage with SQL Server
• Included a code example showing how to use SQL Server 2019
• Provided a link to Microsoft Container Registry for available tags

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