bump npm ubuntu image to 24.04

Author: matmerr

npm/linux.Dockerfile

@@ -6,7 +6,7 @@ WORKDIR /usr/local/src
 COPY . .
 RUN CGO_ENABLED=0 go build -v -o /usr/local/bin/azure-npm -ldflags "-X main.version="$VERSION" -X "$NPM_AI_PATH"="$NPM_AI_ID"" -gcflags="-dwarflocationlists=true" npm/cmd/*.go
 
-FROM mcr.microsoft.com/mirror/docker/library/ubuntu:20.04 as linux
+FROM mcr.microsoft.com/mirror/docker/library/ubuntu:24.04 as linux
 COPY --from=builder /usr/local/bin/azure-npm /usr/bin/azure-npm
 RUN apt-get update && apt-get install -y iptables ipset ca-certificates && apt-get autoremove -y && apt-get clean
 RUN chmod +x /usr/bin/azure-npm