ci: skip Bundler install in gem-push workflow

[07souravkunda]

Problem

The Ruby Gem → Build + Publish workflow fails at ruby/setup-ruby (run 36133351430):

Using Bundler 2.7.1 from Gemfile.lock BUNDLED WITH 2.7.1
ERROR:  Error installing bundler:
    There are no versions of bundler (= 2.7.1) compatible with your Ruby & RubyGems
    bundler requires Ruby version >= 3.2.0. The current ruby version is 2.6.10.210.

Gemfile.lock was regenerated with Bundler 2.7.1 in ee74327, and 524db87 added the CHECKSUMS block on top. By default, setup-ruby installs the BUNDLED WITH version, but Bundler 2.7 can't be installed on the job's Ruby 2.6.10.

Fix

Set bundler: none on the setup-ruby step. The job only runs gem build and gem push, and neither uses Bundler.

• The publish Ruby stays at 2.6.10.
• The lockfile is unchanged. Downgrading it to Bundler 2.4.x, the last line that supports Ruby 2.6, would drop the CHECKSUMS integrity block.

Verification

• The workflow YAML parses, and the step's with: is {"ruby-version"=>"2.6.10", "bundler"=>"none"}.
• action.yml at the pinned setup-ruby SHA (v1.324.0) documents none as "nothing is done".
• gem build *.gemspec succeeds locally without Bundler and produces browserstack-local-1.5.1.gem.
• The workflow itself was not run, because it publishes to RubyGems. Re-dispatch it after merge to release.

🤖 Generated with Claude Code

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