Trivial Change to Unblock Phpstan Update (#2737)

I cannot duplicate the problem blocking #2720, but this trivial change should work anyhow.

Author: oleibman

src/PhpSpreadsheet/Reader/Ods.php

@@ -655,7 +655,7 @@ private function lookForSelectedCells(DOMElement $settings, Spreadsheet $spreads
                             $setRow = $configItem->nodeValue;
                         }
                     }
-                    $this->setSelected($spreadsheet, $wsname, $setCol, $setRow);
+                    $this->setSelected($spreadsheet, $wsname, "$setCol", "$setRow");
                 }
 
                 break;