Adds samples dir to UPM branch updater

Author: tomkail

.github/workflows/Update-UPM-Branch.yml

@@ -22,4 +22,5 @@ jobs:
         uses: hecomi/create-upm-branch-action@main
         with:
           git-tag: ${{ steps.tag.outputs.name }}
-          pkg-root-dir-path: Packages/Ink
+          pkg-root-dir-path: Packages/Ink
+          samples-dir: Packages/Ink/Demos