Add content understanding to private endpoint (#2225)

Author: pamelafox

infra/main.bicep

@@ -1072,6 +1072,7 @@ var openAiPrivateEndpointConnection = (isAzureOpenAiHost && deployAzureOpenAi &&
         resourceIds: concat(
           [openAi.outputs.resourceId],
           useGPT4V ? [computerVision.outputs.resourceId] : [],
+          useMediaDescriberAzureCU ? [contentUnderstanding.outputs.resourceId] : [],
           !useLocalPdfParser ? [documentIntelligence.outputs.resourceId] : []
         )
       }