Update slither.yml

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

Author: PixelPil0t1

.github/workflows/slither.yml

@@ -19,7 +19,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 25