fix: tests and code

Author: IvanJosipovic

src/KubernetesClient/KubernetesYaml.cs

@@ -78,7 +78,7 @@ public object ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeseria
                             return null;
                         }
 
-                        return Encoding.UTF8.GetBytes(scalar.Value);
+                        return Convert.FromBase64String(scalar.Value);
                     }
                     finally
                     {

tests/KubernetesClient.Tests/KubernetesYamlTests.cs

@@ -813,8 +813,8 @@ public void LoadSecret()
 ";
 
             var result = KubernetesYaml.Deserialize<V1Secret>(kManifest, true);
-            Assert.Equal("bXktYXBw", Encoding.UTF8.GetString(Convert.FromBase64String(Encoding.UTF8.GetString(result.Data["username"]))));
-            Assert.Equal("Mzk1MjgkdmRnN0pi", Encoding.UTF8.GetString(Convert.FromBase64String(Encoding.UTF8.GetString(result.Data["password"]))));
+            Assert.Equal("bXktYXBw", Encoding.UTF8.GetString(result.Data["username"]));
+            Assert.Equal("Mzk1MjgkdmRnN0pi", Encoding.UTF8.GetString(result.Data["password"]));
         }
 
         [Fact]