Fix bad copy & paste

Author: jum

Dockerfile

@@ -16,7 +16,7 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
 		--with github.com/gamalan/caddy-tlsredis \
 		--with github.com/caddy-dns/cloudflare \
 		--with github.com/lucaslorentz/caddy-docker-proxy/v2 \
-		--with github.com:leodido/caddy-jsonselect-encoder
+		--with github.com/leodido/caddy-jsonselect-encoder
 
 # Now copy it into our base image.
 FROM alpine:latest as alpine