Add workflow for periodically fetching the currently decided feed

Currently this is just the codemeta tag from softwareheritage.org
which can change later

Author: meldra

.github/workflows/news.yml

@@ -0,0 +1,27 @@
+name: Update news
+
+on:
+  schedule:
+  # Get the feed every day at 1:13 UTC
+    - cron: "13 1 * * *"
+  # allow manual update
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Download File
+      run: |
+        curl https://www.softwareheritage.org/tag/codemeta/feed/ --output ./data/news.xml
+      working-directory: ${{ github.workspace }}
+    - name: Commit and Push Changes
+      run: |
+        git config --global user.name "${{ github.actor }}"
+        git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+
+        git add ./data/news.xml
+        git commit -m 'Update news feed'
+        git push