build failures due to golang version mismatches

[ryepup]

Describe the bug

Daily run is failing https://github.com/nginx/nginx-directive-reference/actions/runs/15709569263

go: golang.org/x/tools/gopls@latest: golang.org/x/tools/gopls@v0.19.0 requires go >= 1.24.2 (running go 1.23.10; GOTOOLCHAIN=local)

To reproduce

Steps to reproduce the behavior:

1. cd tools/devtools
2. make devtools-image
3. command fails on installing golang tools

------
 > [golang 2/2] RUN go install github.com/jstemmer/go-junit-report/v2@latest     && go install -v golang.org/x/tools/gopls@latest     && go install github.com/go-delve/delve/cmd/dlv@latest     && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.62.2:
0.289 go: downloading github.com/jstemmer/go-junit-report v1.0.0
0.295 go: downloading github.com/jstemmer/go-junit-report/v2 v2.1.0
5.[124](https://github.com/nginx/nginx-directive-reference/actions/runs/15709569263/job/44263779275#step:3:125) go: downloading golang.org/x/tools v0.34.0
5.258 go: downloading golang.org/x/tools/gopls v0.19.0
5.722 go: golang.org/x/tools/gopls@latest: golang.org/x/tools/gopls@v0.19.0 requires go >= 1.24.2 (running go 1.23.10; GOTOOLCHAIN=local)

Expected behavior

Command works, making an image that can be used to build the rest of the code.

Your environment

CI pipeline