feat: update ts solution to lcci problem: No.16.05 (doocs#2611)

Author: thinkasany

lcci/16.05.Factorial Zeros/README.md

@@ -85,7 +85,7 @@ func trailingZeroes(n int) int {
 ```ts
 function trailingZeroes(n: number): number {
     let ans = 0;
-    while (n > 0) {
+    while (n) {
         n = Math.floor(n / 5);
         ans += n;
     }

lcci/16.05.Factorial Zeros/README_EN.md

@@ -93,7 +93,7 @@ func trailingZeroes(n int) int {
 ```ts
 function trailingZeroes(n: number): number {
     let ans = 0;
-    while (n > 0) {
+    while (n) {
         n = Math.floor(n / 5);
         ans += n;
     }

lcci/16.05.Factorial Zeros/Solution.ts

@@ -1,6 +1,6 @@
 function trailingZeroes(n: number): number {
     let ans = 0;
-    while (n > 0) {
+    while (n) {
         n = Math.floor(n / 5);
         ans += n;
     }