Update dependency mcr.microsoft.com/windows/nanoserver to v2009

Author: renovate[bot]

docker/Dockerfile.windows.1803

@@ -1,5 +1,5 @@
 # escape=`
-FROM mcr.microsoft.com/windows/nanoserver:1803
+FROM mcr.microsoft.com/windows/nanoserver:2009
 USER ContainerAdministrator
 
 ENV GODEBUG=netdns=go

docker/Dockerfile.windows.1809

@@ -3,7 +3,7 @@
 FROM mcr.microsoft.com/windows/servercore:ltsc2019 as core
 
 
-FROM mcr.microsoft.com/windows/nanoserver:1809
+FROM mcr.microsoft.com/windows/nanoserver:2009
 USER ContainerAdministrator
 
 ENV GODEBUG=netdns=go

docker/Dockerfile.windows.1903

@@ -1,5 +1,5 @@
 # escape=`
-FROM mcr.microsoft.com/windows/nanoserver:1903
+FROM mcr.microsoft.com/windows/nanoserver:2009
 USER ContainerAdministrator
 
 ENV GODEBUG=netdns=go

docker/Dockerfile.windows.1909

@@ -1,5 +1,5 @@
 # escape=`
-FROM mcr.microsoft.com/windows/nanoserver:1909
+FROM mcr.microsoft.com/windows/nanoserver:2009
 USER ContainerAdministrator
 
 ENV GODEBUG=netdns=go