refactor: change Dockerfile paths

Signed-off-by: Mikel Olasagasti Uranga <mikel@olasagasti.info>

Dockerfile

@@ -3,7 +3,6 @@ FROM golang:1.24-alpine AS build-env
 RUN apk add build-base
 WORKDIR /app
 COPY . /app
-WORKDIR /app/v2
 RUN go mod download
 RUN go build ./cmd/subfinder
 
@@ -11,6 +10,6 @@ RUN go build ./cmd/subfinder
 FROM alpine:latest
 RUN apk upgrade --no-cache \
     && apk add --no-cache bind-tools ca-certificates
-COPY --from=build-env /app/v2/subfinder /usr/local/bin/
+COPY --from=build-env /app/subfinder /usr/local/bin/
 
 ENTRYPOINT ["subfinder"]