Fix GH_TOKEN secret reference in Docker image upload workflow

[vikman90]

Description

The GitHub Actions workflow responsible for uploading Docker package building images was failing due to an incorrect reference to the GH_TOKEN secret: #1.

gh: To use GitHub CLI in a GitHub Actions workflow, set the GH_TOKEN environment variable. Example:
  env:
    GH_TOKEN: ${{ github.token }}

The error message indicated that the GH_TOKEN environment variable was not properly set.

Proposed Changes

• Updated the workflow to use the CI_WAZUH_AGENT_PACKAGES_CLASSIC secret as the value for GH_TOKEN.

Results and Evidence

Status	Workflow File Name	Run
🟢	6_builderpackage_docker-upload	#2

Artifacts Affected

• .github/workflows/6_builderpackage_docker-upload.yml

Review Checklist

• Code changes reviewed
• Relevant evidence provided
• Meets requirements and/or definition of done
• No unresolved dependencies with other issues