Add bundle install to release workflow

Author: horgh

.github/workflows/release.yml

@@ -30,6 +30,8 @@ jobs:
         with:
           ruby-version: ruby
 
+      - run: bundle install
+
       # zizmor complains that 'v1' is a ref that can be provided by both the branch and tag namespaces.
       # specify that we want the v1 branch.
       - uses: rubygems/release-gem@refs/heads/v1