Add v2 to config

Author: shekodn

.circleci/config.yml

@@ -28,20 +28,20 @@ jobs:
       # Reference: https://www.benpickles.com/articles/76-better-ruby-gem-caching-on-circleci
       - restore_cache:
           keys:
-            - bundler-{{ checksum "Gemfile.lock" }}-v2
-            - bundler-
+            - bundler-v2-{{ checksum "Gemfile.lock" }}
+            - bundler-v2-
 
       - run: bundle install --clean --path vendor/bundle
 
       - save_cache:
-          key: bundler-{{ checksum "Gemfile.lock" }}-v2
+          key: bundler-v2-{{ checksum "Gemfile.lock" }}
           paths:
             - vendor/bundle
 
       # Cache Dependencies
       - type: cache-save
         name: Store bundle cache
-        key: tutor_virtual-{{ checksum "Gemfile.lock" }}-v2
+        key: tutor_virtual-v2-{{ checksum "Gemfile.lock" }}
         paths:
           - vendor/bundle