Update the README to use the new ReadFrom.Configuration() method

Author: 0xced

README.md

@@ -65,8 +65,9 @@ Root section name can be changed:
 ```
 
 ```csharp
+var context = new ConfigurationContext { SectionName = "CustomSection" };
 var logger = new LoggerConfiguration()
-    .ReadFrom.Configuration(configuration, sectionName: "CustomSection")
+    .ReadFrom.Configuration(configuration, context)
     .CreateLogger();
 ```
 
@@ -106,8 +107,9 @@ In case of [non-standard](#azure-functions-v2-v3) dependency management you can
 ```csharp
 var functionDependencyContext = DependencyContext.Load(typeof(Startup).Assembly);
 
+var context = new ConfigurationContext(functionDependencyContext) { SectionName = "AzureFunctionsJobHost:Serilog" };
 var logger = new LoggerConfiguration()
-    .ReadFrom.Configuration(hostConfig, sectionName: "AzureFunctionsJobHost:Serilog", dependencyContext: functionDependencyContext)
+    .ReadFrom.Configuration(hostConfig, context)
     .CreateLogger();
 ```
 
@@ -119,8 +121,9 @@ var configurationAssemblies = new[]
     typeof(ConsoleLoggerConfigurationExtensions).Assembly,
     typeof(FileLoggerConfigurationExtensions).Assembly,
 };
+var context = new ConfigurationContext(configurationAssemblies);
 var logger = new LoggerConfiguration()
-    .ReadFrom.Configuration(configuration, configurationAssemblies)
+    .ReadFrom.Configuration(configuration, context)
     .CreateLogger();
 ```
 
@@ -376,9 +379,9 @@ public class Startup : FunctionsStartup
         {
             var functionDependencyContext = DependencyContext.Load(typeof(Startup).Assembly);
 
-            var hostConfig = sp.GetRequiredService<IConfiguration>();
+            var context = new ConfigurationContext(functionDependencyContext) { SectionName = "AzureFunctionsJobHost:Serilog" };
             var logger = new LoggerConfiguration()
-                .ReadFrom.Configuration(hostConfig, sectionName: "AzureFunctionsJobHost:Serilog", dependencyContext: functionDependencyContext)
+                .ReadFrom.Configuration(hostConfig, context)
                 .CreateLogger();
 
             return new SerilogLoggerProvider(logger, dispose: true);