Bump version to V1.34.0-pre1

BUILD

@@ -84,7 +84,7 @@ g_stands_for = "gauntlet"
 
 core_version = "13.0.0"
 
-version = "1.34.0-dev"
+version = "1.34.0-pre1"
 
 GPR_PUBLIC_HDRS = [
     "include/grpc/support/alloc.h",

build_handwritten.yaml

@@ -15,7 +15,7 @@ settings:
   core_version: 13.0.0
   csharp_major_version: 2
   g_stands_for: gauntlet
-  version: 1.34.0-dev
+  version: 1.34.0-pre1
 targets:
 - name: check_epollexclusive
   build: tool

doc/g_stands_for.md

@@ -33,4 +33,5 @@
 - 1.31 'g' stands for ['galore'](https://github.com/grpc/grpc/tree/v1.31.x)
 - 1.32 'g' stands for ['giggle'](https://github.com/grpc/grpc/tree/v1.32.x)
 - 1.33 'g' stands for ['geeky'](https://github.com/grpc/grpc/tree/v1.33.x)
-- 1.34 'g' stands for ['gauntlet'](https://github.com/grpc/grpc/tree/master)
+- 1.34 'g' stands for ['gauntlet'](https://github.com/grpc/grpc/tree/v1.34.x)
+- 1.35 'g' stands for ['gecko'](https://github.com/grpc/grpc/tree/master)