chore(deps): update resource microsoft.web/sites to 2024-04-01 (#1479)

This PR contains the following updates:

| Resource | Change |
|---|---|
| Microsoft.Web/sites | `2023-12-01` -> `2024-04-01` |

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.azure/modules/functionApp/appSettings.bicep

@@ -7,7 +7,7 @@ param appSettings object
 @description('The current app settings of the web application')
 param currentAppSettings object
 
-resource webApp 'Microsoft.Web/sites@2023-12-01' existing = {
+resource webApp 'Microsoft.Web/sites@2024-04-01' existing = {
   name: webAppName
 }
 

.azure/modules/functionApp/slackNotifier.bicep

@@ -97,7 +97,7 @@ resource applicationInsights 'Microsoft.Insights/components@2020-02-02' existing
 
 var functionAppNameMaxLength = 40
 var functionAppName = uniqueResourceName('${namePrefix}-slacknotifier-fa', functionAppNameMaxLength)
-resource functionApp 'Microsoft.Web/sites@2023-12-01' = {
+resource functionApp 'Microsoft.Web/sites@2024-04-01' = {
   name: functionAppName
   location: location
   kind: 'functionapp'