Add an X< > for ≅

Author: samcv

doc/Language/operators.pod6

@@ -1658,7 +1658,7 @@ multi sub infix:<=~=>(Complex:D, Complex:D)
 multi sub infix:<=~=>(Numeric:D, Numeric:D)
 =end code
 
-The X<approximately-equal operator>. Calculates the relative difference between
+The X<approximately-equal operator|infix, ≅>. Calculates the relative difference between
 the left-hand and right-hand sides and returns C<True> if the difference is
 less than $*TOLERANCE (which defaults to 1e-15). However, if either side is zero
 then it checks that the absolute difference between the sides is less than $*TOLERANCE.