fix(ci): install golangci-lint from source to match Go 1.25.1

Changed from binary install (v1.61.0 built with Go 1.23) to source install
using 'go install @latest' which will build with our Go 1.25.1 version.

Fixes: Error: the Go language version (go1.23) used to build golangci-lint
is lower than the targeted Go version (1.25.1)