Case T-525/19: Judgment of the General Court of 21 April 2021 — Intering and Others v Commission (Public contracts — Tendering procedure — Reduction of dust and nitrogen oxide emissions at the Kosovo B thermal power plant, Units B1 and B2 — Rejection of the application — Application for annulment submitted in the reply — New claims — Manifest inadmissibility — Amendment of the selection criteria during the procedure — Equal treatment)