Fix to logic in centenarian example

Age need not be integral, and someone who is, for example, 99.5 years old is not a centenarian.

files/en-us/web/javascript/reference/template_literals/index.md

@@ -151,7 +151,7 @@ function myTag(strings, personExp, ageExp) {
   const str1 = strings[1]; // " is a "
   const str2 = strings[2]; // "."
 
-  const ageStr = ageExp > 99 ? "centenarian" : "youngster";
+  const ageStr = ageExp < 100 ? "youngster" : "centenarian";
 
   // We can even return a string built using a template literal
   return `${str0}${personExp}${str1}${ageStr}${str2}`;