SSLTLS -> SslTls (OrchardCMS#17938)

Author: hishamco

src/OrchardCore.Cms.Web/appsettings.json

@@ -253,7 +253,7 @@
     //  // Uncomment if SMTP server runs through a proxy server
     //  //"ProxyHost": "proxy.domain.com",
     //  //"ProxyPort": 5050,
-    //  "EncryptionMethod": "SSLTLS",
+    //  "EncryptionMethod": "SslTls",
     //  "AutoSelectEncryption": false,
     //  "UseDefaultCredentials": false,
     //  "RequireCredentials": true,

src/docs/reference/modules/Email.Smtp/README.md

@@ -42,7 +42,7 @@ You may configure the Default SMTP provider by the configuration provider using
     // Uncomment if SMTP server runs through a proxy server
     //"ProxyHost": "proxy.domain.com",
     //"ProxyPort": 5050,
-    "EncryptionMethod": "SSLTLS",
+    "EncryptionMethod": "SslTls",
     "AutoSelectEncryption": false,
     "UseDefaultCredentials": false,
     "RequireCredentials": true,