Add missing C in C<e>

Author: AlexDaniel

doc/Language/terms.pod6

@@ -181,7 +181,7 @@ of a circle. C<tau> is the ASCII equivalent of C<τ>.
 
 =head2 term 𝑒
 
-Returns Euler's number.  The ASCII equivalent of C<𝑒> is <e>.
+Returns Euler's number.  The ASCII equivalent of C<𝑒> is C<e>.
 
 =head2 term e