vendor.mod: bump go line to 1.20

[neersighted]

• Follow-up to/related to update to go1.21.1, default to GOTOOLCHAIN=local #46069
• Related to Update to BuildKit 0.12 #45966 (comment)

[thaJeztah]

Looks like you included the other commits as well; can you make it with only the go.mod changes?

[thaJeztah]

(given that we're already on go1.20, that should still work I think?)

[neersighted]

Ah, I intentionally stacked this on top of your branch, but you make a fair point that we can do this independent of your changes.

[thaJeztah]

LGTM

wondering if we still need the -compat option, or if we can remove that one (but that's perfectly fine for a separate PR);

moby/hack/vendor.sh

Line 13 in a1d966c

"${SCRIPTDIR}"/with-go-mod.sh go mod tidy -modfile vendor.mod -compat 1.18

[thaJeztah]

Ah, I intentionally stacked this on top of your branch, but you make a fair point that we can do this independent of your changes.

Yes, and I think we should merge this PR before mine to have the changes in the desired order 😄