withdraw: add v1.2.2-aio.2 (link extra -> payout passthrough)

New entry alongside -aio.1 (instances on the old version keep resolving
it). Enables bitSpire cash-in settlements: a withdraw link's extra now
rides onto the payout payment so spirekeeper's cash_in listener fires.
See aiolabs/withdraw#3.

extensions.json

@@ -305,6 +305,16 @@
             "archive": "https://git.atitlan.io/aiolabs/withdraw/archive/v1.2.2-aio.1.zip",
             "hash": "38c9baf92966b6d8bdb13af12cf324cff4bafd19510cd56650d69e864011492d"
         },
+        {
+            "id": "withdraw",
+            "repo": "https://git.atitlan.io/aiolabs/withdraw",
+            "name": "AIO Withdraw",
+            "version": "1.2.2-aio.2",
+            "short_description": "AIO fork of lnbits/withdraw",
+            "icon": "https://github.com/lnbits/withdraw/raw/main/static/image/lnurl-withdraw.png",
+            "archive": "https://git.atitlan.io/aiolabs/withdraw/archive/v1.2.2-aio.2.zip",
+            "hash": "5e55ff7fce738b84e22ac5d5e82aa1a1d32cc76184025da15b95e6c42c8c7a8c"
+        },
         {
             "id": "libra",
             "repo": "https://git.atitlan.io/aiolabs/libra",