Bill Wither’s 1972 No. 1 hit, “Lean on Me,” has often served as a soundtrack of hope during charity events and times of need. With the COVID-19 pandemic, we are in a time of need. Tenille Townes recruited a handful of her musically gifted friends—Abby Anderson, Kassi Ashton, Keelan Donovan, Alex Hall, Adam Hambrick and…