By Daniel Moxon The woman who accused Christian Horner of inappropriate behaviour is set to appeal the decision to dismiss the grievance she made against him. Red Bull Racing team principal Horner was accused by a female colleague. And, in early February, the Austria-based parent company announced an investigation into the complaint. An external KC was hired to look into the matter and, after grilling Horner and weighing up the evidence, presented his findings to the firm. That report has been kept under wraps, but it led to the company clearing Horner of wrongdoing. It was communicated at the…