bug: Use fork of libdns/route53 with upgraded AWS SDK

There is a bug in the version of the AWS SDK that libdns/route53 currently uses, so instead use a fork that has the SDK version bumped.

Related:
 * aws/aws-sdk-go-v2#2370 (comment)
 * libdns/route53#235
 * caddy-dns/route53#42

Dockerfile

@@ -3,7 +3,8 @@ FROM caddy:${CADDY_VERSION}-builder AS builder
 
 RUN xcaddy build \
     --with github.com/lucaslorentz/caddy-docker-proxy/v2 \
-    --with github.com/caddy-dns/route53
+    --with github.com/caddy-dns/route53 \
+    --replace github.com/libdns/route53=github.com/winterqt/libdns-route53@upgrade-aws-sdk
 
 FROM caddy:${CADDY_VERSION}-alpine