Fix C# code benchmark timing regression

Il2CppDumper/Program.cs

@@ -147,7 +147,7 @@ namespace Il2CppInspector
 
             // Analyze data
             List<Il2CppInspector> il2cppInspectors;
-            using (var timer = new Benchmark("Analyze IL2CPP data"))
+            using (var il2cppTimer = new Benchmark("Analyze IL2CPP data"))
                 il2cppInspectors = Il2CppInspector.LoadFromFile(options.BinaryFile, options.MetadataFile);
 
             if (il2cppInspectors == null)
@@ -158,12 +158,11 @@ namespace Il2CppInspector
             foreach (var il2cpp in il2cppInspectors) {
                 // Create model
                 Il2CppModel model;
-                using (var timer1 = new Benchmark("Create type model"))
+                using (var modelTimer = new Benchmark("Create type model"))
                     model = new Il2CppModel(il2cpp);
 
                 // C# signatures output
-                using var timer2 = new Benchmark("Generate C# code");
+                using (var signaturesDumperTimer = new Benchmark("Generate C# code")) {
-
                     var writer = new Il2CppCSharpDumper(model) {
                         ExcludedNamespaces = options.ExcludedNamespaces.ToList(),
                         SuppressMetadata = options.SuppressMetadata,
@@ -213,6 +212,7 @@ namespace Il2CppInspector
                             writer.WriteFilesByClassTree(csOut, options.SeparateAssemblyAttributesFiles);
                             break;
                     }
+                }
 
                 // IDA Python script output
                 using (var scriptDumperTimer = new Benchmark("IDA Python Script Dumper")) {