point to wip builder branch

Author: sbSteveK

.github/workflows/ci.yml

@@ -7,7 +7,8 @@ on:
       - 'docs'
 
 env:
-  BUILDER_VERSION: v0.9.86
+  # BUILDER_VERSION: v0.9.86
+  BUILDER_VERSION: ubuntu-18-x64-keep
   BUILDER_SOURCE: releases
   BUILDER_HOST: https://d19elf31gohf1l.cloudfront.net
   PACKAGE_NAME: aws-crt-python