Fix heading for content file (#3509)

Removed unnecessary heading <code> tag.

src/data/roadmaps/javascript/content/106-javascript-loops-iterations/103-for-statement.md

@@ -1,4 +1,4 @@
-# The `for` loop
+# The for loop
 
 The `for` loop is a standard control-flow construct in many programming languages, including JavaScript. It's commonly used to iterate over given sequences or iterate a known number of times and execute a piece of code for each iteration.