chore(deps): update mcr.microsoft.com/azure-sdk/azure-mcp docker tag to v0.8.4 (#221)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

registry/azure/spec.yaml

@@ -61,7 +61,7 @@ tags:
   - infrastructure
   - database
   - storage
-image: mcr.microsoft.com/azure-sdk/azure-mcp:0.8.3
+image: mcr.microsoft.com/azure-sdk/azure-mcp:0.8.4
 permissions:
   network:
     outbound: