Updates all Go version references in the codebase to use Go 1.24.4.
## Changes
- Update `go.mod` to use Go 1.24.4
- Update `dogfood/coder/Dockerfile` GO_VERSION to 1.24.4
- Update `.github/actions/setup-go/action.yaml` default version to
1.24.4
- Update `examples/parameters-dynamic-options/variables.yml` to use
golang:1.24
## Testing
- ✅ All Go version references are consistent (verified with
`scripts/check_go_versions.sh`)
- ✅ Build tested successfully with Go 1.24.4
- ✅ Binary runs correctly
Co-authored-by: blink-so[bot] <211532188+blink-so[bot]@users.noreply.github.com>
Co-authored-by: sreya <4856196+sreya@users.noreply.github.com>
