Corrected pdb-tool entry
Corrected pdb-tool entry

amjjbonvin/haddocking.github.io,haddocking/haddocking.github.io,amjjbonvin/haddocking.github.io,amjjbonvin/haddocking.github.io,haddocking/haddocking.github.io,haddocking/haddocking.github.io,amjjbonvin/haddocking.github.io,haddocking/haddocking.github.io