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

[mrz1836]

What Changed

• Updated MAGE_X_VERSION from v1.20.14 to v1.20.15 in .github/env/10-mage-x.env
• 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

• Brings MAGE-X tooling to the latest stable release with potential bug fixes and improvements
• Updates the Go version used for vulnerability scanning to incorporate the latest security checks
• Updates the Go coverage tool to the latest version for improved code coverage analysis

Testing Performed

• Verify that CI workflows continue to execute successfully with the updated tool versions
• Confirm that govulncheck runs properly with Go 1.26.2
• Validate that coverage reporting functions correctly with v1.3.8 of the coverage tool

Impact / Risk

• Breaking Change: None - these are minor version updates to development and CI tooling
• Risk: Low - version bumps are incremental and limited to development/testing tools
• CI Impact: Minimal - updated versions should maintain compatibility with existing workflows

[Copilot]

Pull request overview

Syncs CI/tooling environment pins from the source repository to keep GitHub Actions tooling up to date for this project’s workflows.

Changes:

• Bumped MAGE_X_VERSION to v1.20.15 in .github/env/10-mage-x.env.
• Bumped GOVULNCHECK_GO_VERSION to 1.26.2 in .github/env/00-core.env.
• Bumped GO_COVERAGE_VERSION to v1.3.8 in .github/env/10-coverage.env.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
.github/env/10-mage-x.env	Updates the pinned MAGE-X version used by workflow setup steps.
.github/env/10-coverage.env	Updates the pinned go-coverage tool version used for coverage reporting.
.github/env/00-core.env	Updates the Go toolchain version used specifically for govulncheck vulnerability scanning.

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