Update build.sh

I was just poking around and I noticed this inconsistency. Was this a mistake, or on purpose? All the other `xcaddy build` commands didn't use `/v2`.

Author: francislavoie

build.sh

@@ -22,12 +22,12 @@ CGO_ENABLED=0 GOARCH=amd64 GOOS=linux \
 CGO_ENABLED=0 GOARCH=arm GOARM=6 GOOS=linux \
     xcaddy build \
     --output ${ARTIFACTS}/binaries/linux/arm/v6/caddy \
-    --with github.com/lucaslorentz/caddy-docker-proxy/plugin/v2=$PWD/plugin
+    --with github.com/lucaslorentz/caddy-docker-proxy/plugin=$PWD/plugin
 
 CGO_ENABLED=0 GOARCH=arm GOARM=7 GOOS=linux \
     xcaddy build \
     --output ${ARTIFACTS}/binaries/linux/arm/v7/caddy \
-    --with github.com/lucaslorentz/caddy-docker-proxy/plugin/v2=$PWD/plugin
+    --with github.com/lucaslorentz/caddy-docker-proxy/plugin=$PWD/plugin
 
 CGO_ENABLED=0 GOARCH=arm64 GOOS=linux \
     xcaddy build \