Update moby/buildkit Docker tag to v0.19.0

Dockerfile

@@ -7,7 +7,7 @@ FROM --platform=$BUILDPLATFORM public.ecr.aws/docker/library/golang:1.23.5-alpin
 COPY helper/ ./
 RUN CGO_ENABLED=0 go build -ldflags "-w -s" -o /build-image
 
-FROM moby/buildkit:v0.18.2-rootless
+FROM moby/buildkit:v0.19.0-rootless
 USER root
 ENV BUILDKIT_COLORS=run=green:warning=yellow:error=red:cancel=255,165,0
 RUN mkdir /etc/buildkit && \