place GMT under cosmology

glossary.tex

@@ -1141,7 +1141,7 @@ Set the darker die to `\dicef{6}' and roll the other.  If this roll fails, it fa
   description={is the universal way to measure time in \glsentrytext{fenestra}, where one \glsentrytext{cycle} equals sixty days, and, and one sixth of a year},
   name={Gnomish Machine Time (GMT)},
   prefix={a\space},
-  parent={fenestra},
+  parent={cosmology},
   type={main},
 ]{gmt}{GMT}{Gnomish Machine Time}