cinnamon: Fix a typo

src/cinnamon/sass/_common.scss

@@ -521,7 +521,7 @@ StScrollView {

                                
                                
                                
                            
                                
                                    
                                        
                                            521  
                                              background-image: url(assets/add-workspace.svg);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            522  
                                              height: 200px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            523  
                                              width: 35px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        524 -
                                          transition-duration: shorter_duration;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        524 +
                                          transition-duration: theme.$state-duration;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            525  
                                              &:hover {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            526  
                                                background-image: url(assets/add-workspace-hover.svg);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            527  
                                              }