expeditor update lint to ruby 3

Signed-off-by: Vasu1105 <vasundhara.jagdale@chef.io>

.expeditor/buildkite/verify.sh

@@ -10,7 +10,7 @@ useradd -m -U --uid 2000 normal
 echo "normal ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers.d/normal
 
 echo "--- updating rubygems"
-gem update -N --system 3.0.6 --force
+gem update -N --system 3.2.3 --force
 
 echo "--- system details"
 uname -a

.expeditor/verify.pipeline.yml

@@ -17,6 +17,14 @@ steps:
         docker:
           image: ruby:2.6
 
+  - label: lint-ruby-3.0
+    command:
+      - RAKE_TASK=test:lint /workdir/.expeditor/buildkite/verify.sh
+    expeditor:
+      executor:
+        docker:
+          image: ruby:3.0
+
   - label: run-tests-ruby-2.6
     command:
       - /workdir/.expeditor/buildkite/verify.sh