www/gitlab-ce: Fix Gemfile

The (similar) fix for Gemfile was already committed [1] but being removed later during gitlab-ce updates.

(cd /wrkdirs/usr/ports/www/gitlab-ce/work/gitlab-foss-v16.5.1 && /bin/rm -f Gemfile.lock && bundle install --local)
Don't run Bundler as root. Installing your bundle as root will break this
application for all non-root users on this machine.
Could not find gem 'aws-sdk-core (~> 3.185.1)' in cached gems or installed
locally.

The source contains the following gems matching 'aws-sdk-core':

• aws-sdk-core-3.186.0
• Error code 7

Reference: https://cgit.freebsd.org/ports/commit/www/gitlab-ce?id=cd3ccf5407757430ac5899a4ba0fecd61992a431 [1]