ci: added fetch depth to checkout to enable super linter v6

Signed-off-by: aserowy <[email protected]>

Author: aserowy

.github/workflows/ci.yaml

@@ -13,6 +13,10 @@ jobs:
     steps:
       - name: checkout
         uses: actions/checkout@v4
+        with:
+          # super-linter needs the full git history to get the
+          # list of files that changed across commits
+          fetch-depth: 0
 
       - name: fmt
         uses: JohnnyMorganz/[email protected]