glab ci run - should auto-detect CI_DEFAULT_BRANCH

[tis-rpage]

Description
glab ci run defaults to master instead of auto-detecting the CI_DEFAULT_BRANCH from gitlab.

Expected Behavior vs Actual Behavior
glab ci run - with default main branch, it executes a pipeline
actual behavior is that it returns a 400 reference not found error

Possible Fix
GET /projects/:id | yq .default_branch

Steps to Reproduce
Set main as default branch for project
Run glab ci run

[clemsbot]

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