added auto update changelog workflow & running auto update once a week

.github/workflows/auto-update.yml

@@ -3,7 +3,7 @@ name: Auto Update Icons
 on:
   push:
   schedule:
-    - cron: '0 0 * * *'
+    - cron: '0 12 * * 1'
 
 jobs:
   generate:

.github/workflows/update-changelog.yaml

@@ -0,0 +1,28 @@
+name: "Update Changelog"
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          ref: main
+
+      - name: Update Changelog
+        uses: stefanzweifel/changelog-updater-action@v1
+        with:
+          latest-version: ${{ github.event.release.name }}
+          release-notes: ${{ github.event.release.body }}
+
+      - name: Commit updated CHANGELOG
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          branch: main
+          commit_message: Update CHANGELOG
+          file_pattern: CHANGELOG.md