Fix formatting for CA5358 code examples (#48939)

Author: kurnakovv

docs/fundamentals/code-analysis/quality-rules/ca5358.md

@@ -68,8 +68,10 @@ For more information, see [How to suppress code analysis warnings](../suppress-w
 ```csharp
 using System.Security.Cryptography;
 
-class ExampleClass {
-    private static void ExampleMethod () {
+class ExampleClass
+{
+    private static void ExampleMethod()
+    {
         RijndaelManaged rijn = new RijndaelManaged
         {
             Mode = CipherMode.ECB
@@ -98,8 +100,10 @@ class ExampleClass
 ```csharp
 using System.Security.Cryptography;
 
-class ExampleClass {
-    private static void ExampleMethod () {
+class ExampleClass
+{
+    private static void ExampleMethod()
+    {
         RijndaelManaged rijn = new RijndaelManaged
         {
             Mode = CipherMode.CBC