WMS 12195: Redact LiveLabs validation screenshots

[Phirlly]

WMS ID: 12195

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Summary

Updates the MCP servers on OCI Container Instances workshop screenshots used in the validation lab to redact sensitive environment details.

Changed files:

• mcp-servers-on-oci-container-instances/images/09-resource-manager-outputs.png
• mcp-servers-on-oci-container-instances/images/11-container-instance-details.png

Validation

• git diff --check
• python3 -m unittest validation/test_livelabs_markdown.py
• python3 validation/livelabs_markdown.py --base-ref upstream/main
• python3 validation/terraform_contracts.py
• python3 validation/resource_manager_package.py --package files/resource-manager/mcp-servers-on-oci-container-instances-rm.zip
• ffprobe dimension check: both changed screenshots are 1280x900
• Visual review of both redacted screenshots

The changed screenshots meet the GitHub image workflow's max 1280px rule.

Checklist - Refer to the Self QA Checklist in WMS for the complete list

Please confirm that the following is completed before submitting your PR

• Complete the Self QA Checklist in WMS
• Your workshop folder structure should be similar to the one used in the sample workshop
• All filenames are lowercase and descriptive (including folders, images, files, etc.)
• Image references in markdown contain an alternate text.
• Ensure the PR does not contain binary or install files and files larger than 100 MB.

Only expected workshop screenshot PNGs are changed; there are no install archives or files larger than 100 MB.

[Phirlly]

Closing for now to consolidate screenshot and launch-reliability updates into a single future PR after verification.