Fix link validation workflow

Author: silvanocerza

.github/workflows/link-validation.yml

@@ -13,8 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
 
       - name: Install Taskfile
         uses: arduino/actions/setup-taskfile@master