fix: extract correct column from gh release list output

The tag is in column 3, not column 1. The previous awk command was
extracting "Library" (first word of title) instead of the actual tag
like "library-docs-0.0.20260106193421".

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: milldr

.github/actions/build-website/action.yml

@@ -67,7 +67,7 @@ runs:
         GH_TOKEN: ${{ inputs.repo_access_token }}
       run: |
         echo "Finding latest library-docs release..."
-        LATEST_TAG=$(gh release list --repo ${{ github.repository }} --limit 50 | grep "library-docs-" | head -1 | awk '{print $1}')
+        LATEST_TAG=$(gh release list --repo ${{ github.repository }} --limit 50 | grep "library-docs-" | head -1 | awk '{print $3}')
         if [ -z "$LATEST_TAG" ]; then
           echo "Error: No library-docs release found. Run the 'Generate Library' workflow first."
           exit 1