fix: add GIT_AUTH_TOKEN secret for docker build git clone [skip-version]

- Docker build fails with exit code 128 on git clone because the build
  context has no GitHub credentials
- BuildKit has pre-defined GIT_AUTH_TOKEN secret for git authentication
- Add secrets: GIT_AUTH_TOKEN=${{ secrets.GITHUB_TOKEN }} to both
  build-push-action steps (no Dockerfile changes needed)

Author: localpibox

.github/workflows/build-and-publish.yml

@@ -238,6 +238,8 @@ jobs:
             PI_HEAD_SHA=${{ steps.config.outputs.sha }}
             LPB_VERSION=${{ steps.config.outputs.LPB_VERSION }}
             LPB_MAX_TOKENS_CONTEXT_RATIO=${{ steps.config.outputs.MAX_TOKENS }}
+          secrets: |
+            GIT_AUTH_TOKEN=${{ secrets.GITHUB_TOKEN }}
           no-cache: ${{ github.event.inputs.no_cache == 'true' }}
           tags: |
             ${{ env.IMAGE_NAME }}:cli
@@ -315,6 +317,8 @@ jobs:
             PI_HEAD_SHA=${{ steps.config.outputs.sha }}
             LPB_VERSION=${{ steps.config.outputs.LPB_VERSION }}
             LPB_MAX_TOKENS_CONTEXT_RATIO=${{ steps.config.outputs.MAX_TOKENS }}
+          secrets: |
+            GIT_AUTH_TOKEN=${{ secrets.GITHUB_TOKEN }}
           no-cache: ${{ github.event.inputs.no_cache == 'true' }}
           tags: |
             ${{ env.IMAGE_NAME }}:web