use checkout v2 and fetch HEAD

Signed-off-by: Michée Lengronne <michee.lengronne@coppint.com>

Author: micheelengronne

.github/workflows/release.yml

@@ -60,7 +60,10 @@ jobs:
         with:
           path: ./CHANGELOGRELEASE.md
 
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+      - run: git checkout HEAD^
 
       - name: Create Release draft
         id: create_release