[Sync] Update project files from source repository (fe6776f)

[mrz1836]

What Changed

• Updated GOVULNCHECK_GO_VERSION from 1.26.1 to 1.26.2 in .github/env/00-core.env
• Updated GO_COVERAGE_VERSION from v1.3.7 to v1.3.8 in .github/env/10-coverage.env

Why It Was Necessary

• Keeps the govulncheck tool up-to-date with the latest Go patch release for improved vulnerability detection
• Updates the Go coverage tooling to the latest version for potential bug fixes and improvements
• Maintains current versions of developer tooling to ensure compatibility and security

Testing Performed

• Version updates will be validated through CI pipeline execution using the updated environment configurations
• Govulncheck will run with Go 1.26.2 to verify vulnerability scanning functionality
• Coverage collection will execute with v1.3.8 to ensure reporting works correctly

Impact / Risk

• Risk Level: Low - patch version updates for tooling dependencies
• Breaking Changes: None expected - these are tool version updates that don't affect application code
• CI Impact: No changes to workflow behavior, only updates to underlying tool versions used for scanning and coverage