fix(ci): replace removed bundle --with flag

Bundler removed --with; it now fails every install step. Use
'bundle config set --local with jsexec' before bundle install.

Author: ronaldtse

.github/workflows/rake.yml

@@ -39,7 +39,8 @@ jobs:
         working-directory: ruby
         run: |
           pip install regex
-          bundle install --with=jsexec
+          bundle config set --local with jsexec
+          bundle install
 
       - name: RSpec
         working-directory: ruby