Upload charm to latest/edge when main branch is updated

.github/workflows/publish-charm.yaml

@@ -25,7 +25,17 @@ jobs:
         id: charm-path
         run: echo "charm_path=$(find . -name '*.charm' -type f -print)" >> $GITHUB_OUTPUT
 
-      - name: Upload charm to Charmhub
+      - name: Upload the charm to Charmhub's latest track
+        # This workflow should only run on the main branch.
+        if: github.ref_name == 'main'
+        uses: canonical/charming-actions/[email protected]
+        with:
+          built-charm-path: ${{ steps.charm-path.outputs.charm_path }}
+          credentials: "${{ secrets.CHARMCRAFT_AUTH }}"
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+          channel: latest/edge
+
+      - name: Upload the charm to Charmhub's 1.16/edge track
         uses: canonical/charming-actions/[email protected]
         with:
           built-charm-path: ${{ steps.charm-path.outputs.charm_path }}