unix: sync minimum Linux Kernel version with requirements page

Change-Id: I306728f5bf19955177365fd9afcc4c8678b6f81f
GitHub-Last-Rev: cf6f9c7
GitHub-Pull-Request: #213
Reviewed-on: https://go-review.googlesource.com/c/sys/+/604136
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>

unix/linux/mkall.go

@@ -40,7 +40,7 @@ const TempDir = "/tmp"
 
 const GOOS = "linux"       // Only for Linux targets
 const BuildArch = "amd64"  // Must be built on this architecture
-const MinKernel = "2.6.23" // https://golang.org/doc/install#requirements
+const MinKernel = "2.6.32" // https://go.dev/wiki/MinimumRequirements#linuxlinux
 
 type target struct {
 	GoArch     string // Architecture name according to Go