hack/update-toc.sh: Use `go install` instead of `go get`
hack/update-toc.sh: Use `go install` instead of `go get`

Signed-off-by: Stephen Augustus <0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33@auggie.dev>

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements