Javascript -> JavaScript (English) (#35183)

* Javascript -> JavaScript (English)

* Update technical documentation page for required change

* Update use-class-syntax-to-define-a-constructor-function.english.md

* Update left-factorials.md

guide/english/algorithms/sorting-algorithms/insertion-sort/index.md

@@ -96,7 +96,7 @@ The algorithm shown below is a slightly optimized version to avoid swapping the
          arr[i+1] = key
 ```
 
-Here is a detailed implementation in Javascript:
+Here is a detailed implementation in JavaScript:
 
 ```
 function insertion_sort(A) {

guide/english/algorithms/sorting-algorithms/selection-sort/index.md

@@ -66,8 +66,8 @@ void recurSelectionSort(int a[], int n, int index = 0)
 }
 ```
 
-### Implementation in Javascript
-``` Javascript
+### Implementation in JavaScript
+```js
 function selection_sort(A) {
     var len = A.length;
     for (var i = 0; i < len - 1; i = i + 1) {