Update pyramid.rst to include new denial

Based on this exchange in IRC:

21:50:18  stangeland | but maybe pyramid is doing something weird when scanning or something                                                                                                             
22:01:45    Keresian | -gasp- pyramid do something weird? blasphemy!                                                                                                                                     
22:07:16      jpenny | well, it would not do anything weird, but perhaps one of the aliens who had absolutely nothing to do with writing it, has a different idea of what is normal....                  
22:09:10      aclark | That's Pyramid's slogan. Pyramid: doing something weird when scanning or something, since 2010™                                                                                   
22:10:14      jpenny | no, the motto is "pyramid, not doing anything strange while scanning, for not over 5000 years"