update Dependabot configuration for Dockerfile to ignore Go releases
outside of the Go 1.21 release series
update "Canary" Dockerfile to reflect one release back from latest
release in Go 1.21 series
confirm that Dependabot configuration changes are working as
intended
NOTE: We intentionally do not update the Go module version; bumping
the Go module version would indicate that this project requires a
newer Go version for functionality provided by that version and that
is not yet the case.
NOTE: We intentionally do not update the Go module version; bumping the Go module version would indicate that this project requires a newer Go version for functionality provided by that version and that is not yet the case.
Refs: