all: release v1.34.1

Change-Id: Iab8603be47d41f7cc289482b30479c20dcb89986
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/583435
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Lasse Folger <lassefolger@google.com>
Reviewed-by: Michael Stapelberg <stapelberg@google.com>

Author: lfolger

internal/version/version.go

@@ -52,8 +52,8 @@ import (
 const (
 	Major      = 1
 	Minor      = 34
-	Patch      = 0
-	PreRelease = "devel"
+	Patch      = 1
+	PreRelease = ""
 )
 
 // String formats the version string for this module in semver format.