Update src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs

Co-authored-by: Vincent Biret <[email protected]>

Author: darrelmiller

src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs

@@ -288,7 +288,7 @@ private static string GetMethods(OpenApiUrlTreeNode node)
         {
             return String.Join("_", node.PathItems.SelectMany(p => p.Value.Operations.Select(o => o.Key))
                 .Distinct()
-                .Select(o => o.ToString().ToUpper())
+                .Select(static o => o.ToString().ToUpper())
                 .Order()
                 .ToList());
         }