Fix typo in tools.md
Fix typo in tools.md
UniversalDependencies/docs,PhyloStar/UDTelugu,PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,UniversalDependencies/docs