fix: parsing absence of check_update value

• Please check this box if this contribution uses AI-generated content (including content generated by GitLab Duo features) as outlined in the GitLab DCO & CLA. As a benefit of being a GitLab Community Contributor, you receive complimentary access to GitLab Duo.

Description

Hotfix

ERROR: Could not parse config value "check_update": strconv.ParseBool: parsing "": invalid syntax%

when check_update not provided

• Hotfix: fix parsing check_update

Related Issues

Resolves #[issue_number]

How has this been tested?

1. run glab with GLAB_CHECK_UPDATE provided - check bool value parsed as expected
2. run glab without GLAB_CHECK_UPDATE - check absence of value treated as true as expected

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)
• Test gap