chore: convert to conditional expression

Author: MaggieKimani1

src/Microsoft.OpenApi/Extensions/EnumExtensions.cs

@@ -58,14 +58,7 @@ public static string GetDisplayName(this Enum enumValue)
                 var attribute = e.GetAttributeOfType<DisplayAttribute>();
 
                 // Return the DisplayAttribute name if it exists, otherwise return the enum's string representation
-                if (attribute?.Name is not null)
-                {
-                    return attribute.Name;
-                }
-                else
-                {
-                    return e.ToString();
-                }
+                return attribute?.Name is not null ? attribute.Name : e.ToString();
             });
         }
     }

src/Microsoft.OpenApi/Reader/V31/OpenApiV31Deserializer.cs

@@ -137,14 +137,9 @@ public static JsonNode LoadAny(ParseNode node, OpenApiDocument hostDocument)
 
         private static IOpenApiExtension LoadExtension(string name, ParseNode node)
         {
-            if (node.Context.ExtensionParsers is not null && node.Context.ExtensionParsers.TryGetValue(name, out var parser))
-            {
-                return parser(node.CreateAny(), OpenApiSpecVersion.OpenApi3_1);
-            }
-            else
-            {
-                return new OpenApiAny(node.CreateAny());
-            }
+            return node.Context.ExtensionParsers is not null && node.Context.ExtensionParsers.TryGetValue(name, out var parser)
+                ? parser(node.CreateAny(), OpenApiSpecVersion.OpenApi3_1)
+                : new OpenApiAny(node.CreateAny());
         }
 
         private static string? LoadString(ParseNode node)