Update btcpay-server app to 1.2.1 (#916)

apps/btcpay-server/docker-compose.yml

@@ -2,7 +2,7 @@ version: "3.7"
 
 services:
   nbxplorer:
-    image: "nicolasdorier/nbxplorer:2.1.55@sha256:e13a24507aa0623a21cd647cbad028ac5c108382142044b1d2d3bcf4410f5fab"
+    image: "nicolasdorier/nbxplorer:2.1.58@sha256:4b66b2285490aa742925912ea30e0f3b06416271b63a17e0eee0d30df543dfa4"
     user: "1000:1000"
     restart: on-failure
     stop_grace_period: 1m
@@ -24,7 +24,7 @@ services:
         ipv4_address: $APP_BTCPAY_SERVER_NBXPLORER_IP
 
   web:
-    image: btcpayserver/btcpayserver:1.1.2@sha256:2632c85646aefa0217285ff9b08cfab4529fdb213c217731bf2218789d091f88
+    image: btcpayserver/btcpayserver:1.2.1@sha256:8c1b890d720e81164d0215b04a1ff6533093397ec4d067e00e12fed7c045e413
     user: "1000:1000"
     restart: on-failure
     stop_grace_period: 1m

apps/registry.json

@@ -433,7 +433,7 @@
         "id": "btcpay-server",
         "category": "Payments",
         "name": "BTCPay Server",
-        "version": "1.1.2",
+        "version": "1.2.1",
         "tagline": "Accept Bitcoin payments with 0 fees & no 3rd party",
         "description": "BTCPay Server is a payment processor that allows you to receive payments in Bitcoin (and altcoins) directly, with no fees, transaction cost or a middleman. It is a non-custodial invoicing system which eliminates the involvement of a third-party.\n\nPayments with BTCPay Server go directly to your wallet, which increases the privacy and security. Your private keys are never uploaded to your Umbrel. There is no address re-use, since each invoice generates a new address deriving from your xpubkey.\n\nYou can not only to attach an unlimited number of stores and use the Lightning Network but also become a payment processor for others. Thanks to the apps built on top of it, you can use BTCPay to receive donations, start a crowdfunding campaign or have an in-store Point of Sale.",
         "developer": "BTCPay Server Foundation",