update to go1.20.7

Includes a fix for CVE-2023-29409

go1.20.7 (released 2023-08-01) includes a security fix to the crypto/tls
package, as well as bug fixes to the assembler and the compiler. See the
Go 1.20.7 milestone on our issue tracker for details:

- https://github.com/golang/go/issues?q=milestone%3AGo1.20.7+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.20.6...go1.20.7

From the mailing list announcement:

[security] Go 1.20.7 and Go 1.19.12 are released

Hello gophers,

We have just released Go versions 1.20.7 and 1.19.12, minor point releases.

These minor releases include 1 security fixes following the security policy:

- crypto/tls: restrict RSA keys in certificates to <= 8192 bits

  Extremely large RSA keys in certificate chains can cause a client/server
  to expend significant CPU time verifying signatures. Limit this by
  restricting the size of RSA keys transmitted during handshakes to <=
  8192 bits.

  Based on a survey of publicly trusted RSA keys, there are currently only
  three certificates in circulation with keys larger than this, and all
  three appear to be test certificates that are not actively deployed. It
  is possible there are larger keys in use in private PKIs, but we target
  the web PKI, so causing breakage here in the interests of increasing the
  default safety of users of crypto/tls seems reasonable.

  Thanks to Mateusz Poliwczak for reporting this issue.

View the release notes for more information:
https://go.dev/doc/devel/release#go1.20.7

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.6
+ARG GO_VERSION=1.20.7
 ARG XX_VERSION=1.2.1
 
 ARG DOCKER_VERSION=24.0.2

hack/dockerfiles/docs.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.6
+ARG GO_VERSION=1.20.7
 ARG FORMATS=md,yaml
 
 FROM golang:${GO_VERSION}-alpine AS docsgen

hack/dockerfiles/generated-files.Dockerfile

@@ -5,7 +5,7 @@
 # Copyright The Buildx Authors.
 # Licensed under the Apache License, Version 2.0
 
-ARG GO_VERSION="1.20.6"
+ARG GO_VERSION="1.20.7"
 ARG PROTOC_VERSION="3.11.4"
 
 # protoc is dynamically linked to glibc so can't use alpine base

hack/dockerfiles/lint.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.6
+ARG GO_VERSION=1.20.7
 
 FROM golang:${GO_VERSION}-alpine
 RUN apk add --no-cache git gcc musl-dev

hack/dockerfiles/vendor.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.20.6
+ARG GO_VERSION=1.20.7
 ARG MODOUTDATED_VERSION=v0.8.0
 
 FROM golang:${GO_VERSION}-alpine AS base