Bump version to 1.27-pre2

BUILD

@@ -81,7 +81,7 @@ g_stands_for = "guantao"
 
 core_version = "9.0.0"
 
-version = "1.27.0-pre1"
+version = "1.27.0-pre2"
 
 GPR_PUBLIC_HDRS = [
     "include/grpc/support/alloc.h",

build.yaml

@@ -15,7 +15,7 @@ settings:
   core_version: 9.0.0
   csharp_major_version: 2
   g_stands_for: guantao
-  version: 1.27.0-pre1
+  version: 1.27.0-pre2
 filegroups:
 - name: alts_tsi
   headers: