Template set resource group names are case-insensitive

Author: nblumhardt

src/SeqCli/Templates/Import/TemplateSetImporter.cs

@@ -77,7 +77,7 @@ static class TemplateSetImporter
         var resourceGroup = await connection.Client.GetAsync<ResourceGroup>(apiRoot, link.Key);
 
         // ExpressionIndexes with mapped ids or identical expressions are assumed to be equivalent.
-        var immutableTarget = template.ResourceGroup == "ExpressionIndexes";
+        var immutableTarget = template.ResourceGroup.Equals("ExpressionIndexes", StringComparison.OrdinalIgnoreCase);
 
         if (state.TryGetCreatedEntityId(template.Name, out var existingId) &&
             await CheckEntityExistenceAsync(connection, resourceGroup, existingId))