Fix make vendor

This commit changes the golang image to one that uses the Go 1.23.8.

1.23-alpine3.21 is still on go 1.23.7 and current `go.mod` requires
go1.23.8 which makes the `make vendor` fail with:

```
0.117 go: go.mod requires go >= 1.23.8 (running go 1.23.7; GOTOOLCHAIN=local)
0.119 Error: failed to get ["github.com/docker/[email protected]"]: failed to execute 'go [get github.com/docker/[email protected]]': failed to execute binary "go" with args [get github.com/docker/[email protected]]: go: go.mod requires go >= 1.23.8 (running go 1.23.7; GOTOOLCHAIN=local)
0.119  *errors.errorString
```

Signed-off-by: Paweł Gronowski <[email protected]>

Author: vvoland

Dockerfile

@@ -2,7 +2,7 @@
 # check=skip=InvalidBaseImagePlatform
 
 ARG ALPINE_VERSION=3.21
-ARG GO_VERSION=1.23
+ARG GO_VERSION=1.23.8
 ARG HTMLTEST_VERSION=0.17.0
 ARG HUGO_VERSION=0.141.0
 ARG NODE_VERSION=22