ci: add changelog flow.

Signed-off-by: Braden Mars <bradenmars@bradenmars.me>

Author: BradenM

.github/workflows/changelog.yml

@@ -0,0 +1,38 @@
+name: Changelog
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  changelog:
+    name: Generate Changelog
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GH_PAT }}
+          fetch-depth: 0
+
+      - name: Setup go
+        uses: actions/setup-go@v3
+
+      - name: Install gh-chglog
+        run: go get github.com/git-chglog/git-chglog/cmd/git-chglog@latest
+
+      - name: Generate Changelog
+        run: git-chglog
+
+      - name: Commit Changes
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git commit -m "chore(chglog): update changelog." -a || true
+
+      - name: Push Changes
+        uses: ad-m/github-push-action@0fafdd62b84042d49ec0cb92d9cac7f7ce4ec79e
+        with:
+          github_token: ${{ secrets.GH_PAT }}
+          branch: ${{ github.ref }}