feat: Generating changelog.md using github actions!

This PR will close down the issue #2797 which will generate a chnagelog.md in the root repository of Porter when a release is published!

fixes: #2797
Signed-off-by: Aviral Singh <itsaviral.2609@gmail.com>

.github/workflows/changelog.yaml

@@ -0,0 +1,34 @@
+name: Generate Changelog for Porter
+on:
+  release:
+    types: [published]
+
+jobs:
+  changelog:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3.3.0
+        with:
+          ref: main
+          fetch-depth: 0
+          token: ${{ secrets.GH_PAT }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+
+      - name: Install conventional-changelog-cli
+        run: npm install -g conventional-changelog-cli
+
+      - name: Generate changelog
+        run: conventional-changelog -p angular -i CHANGELOG.md -s -r 0
+
+      - name: Commit and push changes
+        run: |
+          git config --global user.name 'GitHub Actions'
+          git config --global user.email 'actions@github.com'
+          git add CHANGELOG.md
+          git commit -m "Update Changelog" || echo "No changes to commit"
+          git push origin main