feat: replace walk-usdt

Author: rikiisworking

contracts/v0.2/addresses/baobab/FeedProxy_WALK-KAIA.json

@@ -0,0 +1,3 @@
+{
+  "address": "0x67f8c50b6ca8921a94bad776dda9fabc31069639"
+}

contracts/v0.2/addresses/baobab/FeedProxy_WALK-USDT.json

@@ -0,0 +1,3 @@
+{
+  "address": "0xd5912f1a690dacc4937ae7a3e3fe914c84512c81"
+}

contracts/v0.2/addresses/baobab/Feed_WALK-KAIA.json

@@ -0,0 +1,3 @@
+{
+  "address": "0xdc087d68e7ddf10265a0ce07f5f575e6f082806c"
+}

contracts/v0.2/addresses/baobab/Feed_WALK-USDT.json

@@ -0,0 +1,3 @@
+{
+  "address": "0x6838fd21de1cdd71e9f66eae39fca09d1f2571e5"
+}