update to go1.21.6, go1.20.13

go1.21.6 (released 2024-01-09) includes fixes to the compiler, the runtime, and
the crypto/tls, maps, and runtime/pprof packages. See the Go 1.21.6 milestone on
our issue tracker for details:

- https://github.com/golang/go/issues?q=milestone%3AGo1.21.6+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.21.5...go1.21.6

go1.20.13 (released 2024-01-09) includes fixes to the runtime and the crypto/tls
package. See the Go 1.20.13 milestone on our issue tracker for details:

- https://github.com/golang/go/issues?q=milestone%3AGo1.20.13+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.20.12...go1.20.13

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

script/setup/prepare_env_windows.ps1

@@ -5,7 +5,7 @@
 # lived test environment.
 Set-MpPreference -DisableRealtimeMonitoring:$true
 
-$PACKAGES= @{ mingw = "10.2.0"; git = ""; golang = "1.21.5"; make = ""; nssm = "" }
+$PACKAGES= @{ mingw = "10.2.0"; git = ""; golang = "1.21.6"; make = ""; nssm = "" }
 
 Write-Host "Downloading chocolatey package"
 curl.exe -L "https://packages.chocolatey.org/chocolatey.0.10.15.nupkg" -o 'c:\choco.zip'