Merge pull request #1101 from stan-dev/dependabot/github_actions/Vampire/setup-wsl-6

Bump Vampire/setup-wsl from 5 to 6

Author: jgabry

.github/workflows/R-CMD-check-wsl.yaml

@@ -45,7 +45,7 @@ jobs:
         with:
           extra-packages: any::rcmdcheck, local::.
 
-      - uses: Vampire/setup-wsl@v5
+      - uses: Vampire/setup-wsl@v6
         with:
             distribution: Ubuntu-22.04
             wsl-version: 2