all: release v1.36.12

Updates #1711

Change-Id: Iea3d9c99deae7feee67b02dd69f5ff57f07f2e65
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/811760
Reviewed-by: Nicolas Hillegeer <aktau@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

internal/version/version.go

diff --git a/internal/version/version.go b/internal/version/version.go
index bfb2cfd..58ff0e2 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -52,8 +52,8 @@
 const (
 	Major      = 1
 	Minor      = 36
-	Patch      = 11
-	PreRelease = "devel"
+	Patch      = 12
+	PreRelease = ""
 )
 
 // String formats the version string for this module in semver format.