Upgrade clang-format version to 20

Author: lukamac

.github/workflows/lint.yml

@@ -28,6 +28,6 @@ jobs:
         with:
           sort-paths: "test"
       - name: clang-format Check
-        uses: jidicula/clang-format-action@v4.14.0
+        uses: jidicula/clang-format-action@v4.15.0
         with:
-          clang-format-version: 19
+          clang-format-version: 20