fix incorrect reference in docs/conf.py to logo.jpeg
fix incorrect reference in docs/conf.py to logo.jpeg

pratyakshs/pgmpy,ankurankan/pgmpy,khalibartan/pgmpy,pgmpy/pgmpy,vivek425ster/pgmpy,kislayabhi/pgmpy,liquidmetal/pgmpy,kris-singh/pgmpy,pratyakshs/pgmpy,ankurankan/pgmpy,abinashpanda/pgmpy,abinashpanda/pgmpy,anaviltripathi/pgmpy,sandeepkrjha/pgmpy,palashahuja/pgmpy,yashu-seth/pgmpy,liquidmetal/pgmpy,vivek425ster/pgmpy,palashahuja/pgmpy,pgmpy/pgmpy,anaviltripathi/pgmpy,sandeepkrjha/pgmpy,kris-singh/pgmpy,jhonatanoliveira/pgmpy,khalibartan/pgmpy,jhonatanoliveira/pgmpy,kislayabhi/pgmpy,yashu-seth/pgmpy