getModifiedSheetNames

function getModifiedSheetNames() {

  var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();

  var sheetNames = sheets.map(sheet => sheet.getName());

  var removeText = "_SIT";  // Change this to the text you want to remove

  var addText = "https://telus-iot-5g.atlassian.net/browse/";     // Change this to the text you want to add

  // Modify sheet names: Remove specific text and add new text

  var modifiedSheetNames = sheetNames.map(name =>

    addText+ name.replace(removeText, '').replace(/\s+/g, '')

  );

  return modifiedSheetNames;

}