lib: replace var to let in cli_table.js

PR-URL: #30400
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

Author: Jing19

Diff for: lib/internal/cli_table.js

@@ -30,7 +30,7 @@ const tableChars = {
 
 const renderRow = (row, columnWidths) => {
   let out = tableChars.left;
-  for (var i = 0; i < row.length; i++) {
+  for (let i = 0; i < row.length; i++) {
     const cell = row[i];
     const len = getStringWidth(cell);
     const needed = (columnWidths[i] - len) / 2;
@@ -49,9 +49,9 @@ const table = (head, columns) => {
   const columnWidths = head.map((h) => getStringWidth(h));
   const longestColumn = columns.reduce((n, a) => Math.max(n, a.length), 0);
 
-  for (var i = 0; i < head.length; i++) {
+  for (let i = 0; i < head.length; i++) {
     const column = columns[i];
-    for (var j = 0; j < longestColumn; j++) {
+    for (let j = 0; j < longestColumn; j++) {
       if (rows[j] === undefined)
         rows[j] = [];
       const value = rows[j][i] =