unix/linux: update Dockerfile to Kernel 5.13

Fixes golang/go#47057

Change-Id: I47bc7491ed46afd76d4955c2843f2bb1295c672b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/332969
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/zerrors_linux_amd64.go b/unix/zerrors_linux_amd64.go
index 75730cc..9521a48 100644
--- a/unix/zerrors_linux_amd64.go
+++ b/unix/zerrors_linux_amd64.go
@@ -147,6 +147,7 @@
 	NS_GET_USERNS                    = 0xb701
 	OLCUC                            = 0x2
 	ONLCR                            = 0x4
+	OTPERASE                         = 0x400c4d19
 	OTPGETREGIONCOUNT                = 0x40044d0e
 	OTPGETREGIONINFO                 = 0x400c4d0f
 	OTPLOCK                          = 0x800c4d10