Add workflow to update copyright in LICENSE (#62)

* Add update-license-copyright-years.yml
* It runs on Jan 1 each year

.github/workflows/.github/workflows/update-license-copyright-years.yml

@@ -0,0 +1,20 @@
+name: Update copyright year(s) in license file
+
+on:
+  schedule:
+    - cron: '14 4 1 1 *' # 04:14 AM on January 1
+  workflow_dispatch:
+    # no inputs needed here
+
+jobs:
+  update-license-year:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: FantasticFiasco/action-update-license-year@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          path: LICENSE
+          labels: documentation