Add Visio download link to architecture diagrams

[s4parke]

Most pages appear to have a link to "Download Visio file of this architecture", although several are missing the diagram download link. The ability to customize these diagrams for transformation plans is a game changer.

Many thanks for the excellent work on these guides.

Steps to reproduce

1. First, go to the Implement a hybrid network guide page.
2. Look in the space below the Architecture diagram (fig. 1).
3. Next, go to Long-term security log retention with Azure Data Explorer guide page.
4. Look in the space below the Architecture diagram (fig 2).

Fig. 1 - Yep

Fig. 2 - Nope

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Document Details

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• ID: cce1e234-bf77-9f76-ef22-16df2a86b2dc
• Version Independent ID: cce1e234-bf77-9f76-ef22-16df2a86b2dc
• Content: Long-term security log retention with Azure Data Explorer - Azure Example Scenarios
• Content Source: docs/example-scenario/security/security-log-retention-azure-data-explorer.yml
• Service: architecture-center
• Sub-service: example-scenario
• GitHub Login: @DeepakAgrawalMS
• Microsoft Alias: dagrawal

[mumurug-MSFT]

@s4parke Thanks for the feedback. I have assigned the issue to author, and we will review and update as appropriate.