Add ⁇ ‼ to list of unicode / texas variants

Author: lizmat

doc/Language/unicode_texas.pod6

@@ -58,6 +58,8 @@ equivalents] that have a special meaning in Perl 6.
   −      |  U+2212   | -          | v6.c  |
   ∘      |  U+2218   | o          | v6.c  |
   ≅      |  U+2245   | =~=        | v6.c  |
+  ⁇      |  U+2047   | ??         | v6.c  | as part of ternary
+  ‼      |  U+203C   | !!         | v6.c  | as part of ternary
   π      |  U+03C0   | pi         | v6.c  | 3.14159_26535_89793_238e0
   τ      |  U+03C4   | tau        | v6.c  | 6.28318_53071_79586_476e0
   𝑒      |  U+1D452  | e          | v6.c  | 2.71828_18284_59045_235e0