update to go1.22.6

- https://github.com/golang/go/issues?q=milestone%3AGo1.22.6+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.22.5...go1.22.6

go1.22.6 (released 2024-08-06) includes fixes to the go command, the compiler,
the linker, the trace command, the covdata command, and the bytes, go/types,
and os/exec packages. See the Go 1.22.6 milestone on our issue tracker for
details.

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

contrib/Dockerfile.test

@@ -29,7 +29,7 @@
 #   docker run --privileged containerd-test
 # ------------------------------------------------------------------------------
 
-ARG GOLANG_VERSION=1.22.5
+ARG GOLANG_VERSION=1.22.6
 ARG GOLANG_IMAGE=golang
 
 FROM ${GOLANG_IMAGE}:${GOLANG_VERSION} AS golang

contrib/fuzz/oss_fuzz_build.sh

@@ -43,11 +43,11 @@ go run main.go --target_dir $SRC/containerd/images
 
 apt-get update && apt-get install -y wget
 cd $SRC
-wget --quiet https://go.dev/dl/go1.22.5.linux-amd64.tar.gz
+wget --quiet https://go.dev/dl/go1.22.6.linux-amd64.tar.gz
 
 mkdir temp-go
 rm -rf /root/.go/*
-tar -C temp-go/ -xzf go1.22.5.linux-amd64.tar.gz
+tar -C temp-go/ -xzf go1.22.6.linux-amd64.tar.gz
 mv temp-go/go/* /root/.go/
 cd $SRC/containerd