chore: changes visibility of client getter to avoid it being used for other aspects

Signed-off-by: Vincent Biret <[email protected]>

Author: baywet

src/Microsoft.OpenApi/Reader/OpenApiReaderSettings.cs

@@ -25,7 +25,7 @@ public class OpenApiReaderSettings
         /// </summary>
         public HttpClient HttpClient
         { 
-            get
+            internal get
             {
                 _httpClient ??= httpClient.Value;
                 return _httpClient;

test/Microsoft.OpenApi.Tests/PublicApi/PublicApi.approved.txt

@@ -1497,7 +1497,7 @@ namespace Microsoft.OpenApi.Reader
         public Microsoft.OpenApi.Interfaces.IStreamLoader CustomExternalLoader { get; set; }
         public System.Collections.Generic.List<string> DefaultContentType { get; set; }
         public System.Collections.Generic.Dictionary<string, System.Func<System.Text.Json.Nodes.JsonNode, Microsoft.OpenApi.OpenApiSpecVersion, Microsoft.OpenApi.Interfaces.IOpenApiExtension>> ExtensionParsers { get; set; }
-        public System.Net.Http.HttpClient HttpClient { get; init; }
+        public System.Net.Http.HttpClient HttpClient { init; }
         public bool LeaveStreamOpen { get; set; }
         public bool LoadExternalRefs { get; set; }
         public System.Collections.Generic.Dictionary<string, Microsoft.OpenApi.Interfaces.IOpenApiReader> Readers { get; init; }