App Script

code.gs

function onEdit(e) {
  updateTimestamp(e) // modularize in separate function and add it in the onEdit hook
}

function updateTimestamp(e) {
  var ss=SpreadsheetApp.getActiveSpreadsheet();
  if(ss.getSheetName() === "Jobs") { // change your sheet name here
    ss.setCurrentCell(ss.getRange(`C${ss.getActiveCell().getRow()}`)) // change C to something else if the column is different
    var activeCell = ss.getCurrentCell()
    var now = new Date()
    console.log(`Set date to ${now.toDateString()}`)
    activeCell.setValue(now.toDateString())
    ss.setCurrentCell(ss.getActiveCell())
  }
}