fix(curriculum): Update java code blocks to become csharp (freeCodeCamp#64551)

Co-authored-by: Huyen Nguyen <[email protected]>

Author: clarencepenz

curriculum/challenges/english/blocks/review-javascript-variables-and-data-types/6723be264695fb7e619fe1fa.md

@@ -180,11 +180,11 @@ let error = 404; // JavaScript treats error as a number
 error = "Not Found"; // JavaScript now treats error as a string
 ```
 
-- Other languages, like Java, that are not dynamically typed would result in an error:
+- Other languages, like C#, that are not dynamically typed would result in an error:
 
-```java
+```csharp
 int error = 404; // value must always be an integer
-error = "Not Found"; // This would cause an error in Java
+error = "Not Found"; // This would cause an error in C#
 ```
 
 ## Using the `typeof` Operator

curriculum/challenges/english/blocks/review-javascript/6723d3cfdd0717d3f1bf27e3.md

@@ -183,11 +183,11 @@ let error = 404; // JavaScript treats error as a number
 error = "Not Found"; // JavaScript now treats error as a string
 ```
 
-- Other languages, like Java, that are not dynamically typed would result in an error:
+- Other languages, like C#, that are not dynamically typed would result in an error:
 
-```java
+```csharp
 int error = 404; // value must always be an integer
-error = "Not Found"; // This would cause an error in Java
+error = "Not Found"; // This would cause an error in C#
 ```
 
 ## Using the `typeof` Operator