ci: checkout full history for super-linter workflow

super-linter needs the full git history to get the list of files that
changed across commits.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

.github/workflows/lint-extras.yaml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: checkout source
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Lint Code Base
         uses: super-linter/super-linter/slim@v6