ci: Fix fetch depth for notification workflow

Author: aklinker1

.github/workflows/notify-unreleased-commits.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v5.0.0
+        with:
+          fetch-depth: 0
 
       - name: List Commits
         id: list-commits