add TAG alumni to the list of Acknowledgments (#530)

index.bs

@@ -3819,7 +3819,7 @@ Adrian Hope-Bailie,
 Alan Stearns,
 Aleksandar Totic,
 Alex Russell,
-<!-- Alice Boxhall, (current TAG member) -->
+Alice Boxhall,
 Andreas Stöckel,
 Andrew Betts,
 Anne van Kesteren,
@@ -3832,7 +3832,7 @@ Dan Connolly,
 <!-- Daniel Appelquist, (current TAG member) -->
 Daniel Ehrenberg,
 Daniel Murphy,
-<!-- David Baron, (current TAG member) -->
+David Baron,
 Domenic Denicola,
 Eiji Kitamura,
 Eric Shepherd,
@@ -3848,7 +3848,7 @@ Jake Archibald,
 Jeffrey Yasskin,
 Jeremy Roman,
 Jirka Kosek,
-<!-- Kenneth Rohde Christiansen, (current TAG member) -->
+Kenneth Rohde Christiansen,
 Kevin Marks,
 Lachlan Hunt,
 Léonie Watson,
@@ -3874,9 +3874,9 @@ Philip Taylor,
 Reilly Grant,
 Richard Ishida,
 Rick Byers,
-<!-- Rossen Atanassov, (current TAG member) -->
+Rossen Atanassov,
 Ryan Sleevi,
-<!-- Sangwhan Moon, (current TAG member) -->
+Sangwhan Moon,
 Sergey Konstantinov,
 Stefan Zager,
 Stephen Stewart,