Update imageproviders.md

Update AWS Provider example to be more valid. Makes code easier to consume w/ copy/paste.

Author: jeremysimmons

articles/imagesharp.web/imageproviders.md

@@ -99,7 +99,6 @@ paket add SixLabors.ImageSharp.Web.Providers.AWS --version VERSION_NUMBER
 
 Once installed the cache @SixLabors.ImageSharp.Web.Providers.AWS.AWSS3StorageImageProviderOptions can be configured as follows:
 
-
 ```c#  
 // Configure and register the buckets.  
 // Alteratively use `appsettings.json` to represent the class and bind those settings.
@@ -108,14 +107,14 @@ Once installed the cache @SixLabors.ImageSharp.Web.Providers.AWS.AWSS3StorageIma
     // The "S3Buckets" collection allows registration of multiple buckets.
     options.S3Buckets.Add(new AWSS3BucketClientOptions
     {
-        options.Endpoint = {AWS_ENDPOINT};
-        options.BucketName = {AWS_BUCKET_NAME};
-        options.AccessKey = {AWS_ACCESS_KEY};
-        options.AccessSecret = {AWS_ACCESS_SECRET};
-        options.Region = {AWS_REGION};
+        Endpoint = AWS_ENDPOINT,
+        BucketName = AWS_BUCKET_NAME,
+        AccessKey = AWS_ACCESS_KEY,
+        AccessSecret = AWS_ACCESS_SECRET,
+        Region = AWS_REGION
     });
 })
-.AddProvider<AWSS3StorageImageProviderOptions>()
+.AddProvider<AWSS3StorageImageProvider>()
 ```
 
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