Revert "Update introduction.md"

This reverts commit 59479e30306a41026162f2b3a885a0329fdee15f.
Revert "Revert "Update introduction.md""

This reverts commit 5c6bf1c24652f45255d77c822f1d0fd995840266.
Revert "Revert "Revert "Update introduction.md"""

This reverts commit 6c42b949c1801e51853d0e604ee282e57669c824.
Revert "Revert "Revert "Revert "Update introduction.md""""

This reverts commit 274b31945e34501508ac0fbffa2d34f1506c038d.