Fixes 2 snake tokens

Cockatrice#140 Ophiomancer didn't have an official token until now so this adds that. The snake for Hapatra Vizier of Poisons had a broken link so this also fixes that.

tokens.xml

@@ -7058,7 +7058,7 @@ Equip {1}</text>
                 <cmc>0</cmc>
                 <pt>1/1</pt>
             </prop>
-            <set picURL="https://media-dominaria.cursecdn.com/attachments/113/426/635201279747658553.jpg">C13</set>
+            <set picURL="https://c1.scryfall.com/file/scryfall-cards/large/front/6/6/66d80dd1-b944-4cb2-8578-b4dbcabbbc1e.jpg?1562916501">C13</set>
             <reverse-related>Ophiomancer</reverse-related>
             <token>1</token>
             <tablerow>2</tablerow>
@@ -7073,7 +7073,7 @@ Equip {1}</text>
                 <cmc>0</cmc>
                 <pt>1/1</pt>
             </prop>
-            <set picURL="https://img.scryfall.com/cards/large/front/6/a/6aaa8539-8d21-4da1-8410-d4354078390f.jpg">AKH</set>
+            <set picURL="https://c1.scryfall.com/file/scryfall-cards/large/front/6/a/6aaa8539-8d21-4da1-8410-d4354078390f.jpg?1562844799">AKH</set>
             <reverse-related>Hapatra, Vizier of Poisons</reverse-related>
             <token>1</token>
             <tablerow>2</tablerow>