ci: fetch tags

Author: Enda Phelan

.github/workflows/changelog.yml

@@ -5,14 +5,15 @@ on:
       - main
       - refs/tags/*
 jobs:
-  package:
+  generate_changelog:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
 
+      - name: Fetch changes
+        run: git fetch --prune --tags --unshallow
+    
       - 
         name: Install git-chglog
         uses: craicoverflow/[email protected]