fix: add missing test case and fix double semicolon in screaming snake case challenge (#66458)

curriculum/challenges/english/blocks/daily-coding-challenges-javascript/69272dcf1c24b44fd79137c3.md

@@ -55,6 +55,12 @@ assert.equal(toScreamingSnakeCase("user-address"), "USER_ADDRESS");
 assert.equal(toScreamingSnakeCase("username"), "USERNAME");
 ```
 
+`toScreamingSnakeCase("my_variable_name")` should return `"MY_VARIABLE_NAME"`.
+
+```js
+assert.equal(toScreamingSnakeCase("my_variable_name"), "MY_VARIABLE_NAME");
+```
+
 # --seed--
 
 ## --seed-contents--
@@ -73,6 +79,6 @@ function toScreamingSnakeCase(variableName) {
   let temp = variableName.replace(/[-_]+/g, ' ');
   temp = temp.replace(/([a-z0-9])([A-Z])/g, '$1 $2');
   const words = temp.trim().split(/\s+/);
-  return words.join('_').toUpperCase();;
+  return words.join('_').toUpperCase();
 }
 ```

curriculum/challenges/english/blocks/daily-coding-challenges-python/69272dcf1c24b44fd79137c3.md

@@ -70,6 +70,15 @@ TestCase().assertEqual(to_screaming_snake_case("username"), "USERNAME")`)
 }})
 ```
 
+`to_screaming_snake_case("my_variable_name")` should return `"MY_VARIABLE_NAME"`.
+
+```js
+({test: () => { runPython(`
+from unittest import TestCase
+TestCase().assertEqual(to_screaming_snake_case("my_variable_name"), "MY_VARIABLE_NAME")`)
+}})
+```
+
 # --seed--
 
 ## --seed-contents--