Add fetch-depth: 0 to checkout action for changelog support

Author: mmcky

.github/workflows/ci.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
       - name: Setup Anaconda
         uses: conda-incubator/setup-miniconda@v3
         with: