tools: Fetch more commits for commitlint to validate the commit

Note: It's necessary that you specify the fetch-depth argument to
actions/checkout@v2 step. By default they fetch only latest commit of the
branch, but we need more commits since we validate a range of commit messages.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

.github/workflows/commitlint.yml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
 
       - name: Check Commit
         uses: wagoid/commitlint-github-action@v5