Use Vampire/setup-wsl@v6

Fixes a few issues and transitions us to WSL2 underneath - let's see how this works

Author: NickCraver

.github/workflows/CI.yml

@@ -58,7 +58,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         fetch-depth: 0  # Fetch the full history
-    - uses: Vampire/setup-wsl@v2
+    - uses: Vampire/setup-wsl@v6
       with:
         distribution: Ubuntu-22.04
     - name: Install Redis