Fix CI: Use perl interpreter for gitolite install script instead of bash

The gitolite install script is a Perl script and must be run with perl, not bash.
Running it with bash was causing syntax errors as bash doesn't understand Perl syntax.

This fix ensures the gitolite installation step works correctly in CI.

Co-authored-by: PowerKiKi <[email protected]>

Author: Copilot

.github/workflows/test.yml

@@ -121,7 +121,7 @@ jobs:
         run: |
           sudo useradd --create-home git
           sudo -n -u git -i mkdir bin
-          sudo -n -u git -i bash $GITHUB_WORKSPACE/gitolite/install -to /home/git/bin
+          sudo -n -u git -i perl $GITHUB_WORKSPACE/gitolite/install -to /home/git/bin
           sudo cp plugins/redmine_git_hosting/ssh_keys/redmine_gitolite_admin_id_rsa.pub /home/git/
           sudo chown git.git /home/git/redmine_gitolite_admin_id_rsa.pub
           sudo -n -u git -i bin/gitolite setup -pk redmine_gitolite_admin_id_rsa.pub