[meta.reflection.exception] Fix typo

Author: Andreas-Krug

source/meta.tex

@@ -3487,7 +3487,7 @@
 If \tcode{what} can be represented in the ordinary literal encoding,
 initializes \exposid{what_} with \tcode{what},
 transcoded from UTF-8 to the ordinary literal encoding.
-Otherwhise, \exposid{what_} is value-initialized.
+Otherwise, \exposid{what_} is value-initialized.
 \end{itemdescr}
 
 \indexlibraryctor{exception}%